diff --git a/packages/node_modules/@node-red/nodes/core/common/21-debug.html b/packages/node_modules/@node-red/nodes/core/common/21-debug.html
index 1e472370a..3cba8aaae 100644
--- a/packages/node_modules/@node-red/nodes/core/common/21-debug.html
+++ b/packages/node_modules/@node-red/nodes/core/common/21-debug.html
@@ -195,6 +195,119 @@
                         node.dirty = true;
                     });
                     RED.view.redraw();
+                },
+                requestDebugNodeList: function(filteredNodes) {
+                    var workspaceOrder = RED.nodes.getWorkspaceOrder();
+                    var workspaceOrderMap = {};
+                    workspaceOrder.forEach(function(ws,i) {
+                        workspaceOrderMap[ws] = i;
+                    });
+
+                    var candidateNodes = [];
+                    var candidateSFs = [];
+                    var subflows = {};
+                    RED.nodes.eachNode(function (n) {
+                        var nt = n.type;
+                        if (nt === "debug") {
+                            if (n.z in workspaceOrderMap) {
+                                candidateNodes.push(n);
+                            }
+                            else {
+                                var sf = RED.nodes.subflow(n.z);
+                                if (sf) {
+                                    subflows[sf.id] = {
+                                        debug: true,
+                                        subflows: {}
+                                    };
+                                }
+                            }
+                        }
+                        else if(nt.substring(0, 8) === "subflow:") {
+                            if (n.z in workspaceOrderMap) {
+                                candidateSFs.push(n);
+                            }
+                            else {
+                                var psf = RED.nodes.subflow(n.z);
+                                if (psf) {
+                                    var sid = nt.substring(8);
+                                    var item = subflows[psf.id];
+                                    if (!item) {
+                                        item = {
+                                            debug: undefined,
+                                            subflows: {}
+                                        };
+                                        subflows[psf.id] = item;
+                                    }
+                                    item.subflows[sid] = true;
+                                }
+                            }
+                        }
+                    });
+                    candidateSFs.forEach(function (sf) {
+                        var sid = sf.type.substring(8);
+                        if (containsDebug(sid, subflows)) {
+                            candidateNodes.push(sf);
+                        }
+                    });
+
+                    candidateNodes.sort(function(A,B) {
+                        var wsA = workspaceOrderMap[A.z];
+                        var wsB = workspaceOrderMap[B.z];
+                        if (wsA !== wsB) {
+                            return wsA-wsB;
+                        }
+                        var labelA = RED.utils.getNodeLabel(A,A.id);
+                        var labelB = RED.utils.getNodeLabel(B,B.id);
+                        return labelA.localeCompare(labelB);
+                    });
+                    var currentWs = null;
+                    var data = [];
+                    var currentFlow;
+                    var currentSelectedCount = 0;
+                    candidateNodes.forEach(function(node) {
+                        if (currentWs !== node.z) {
+                            if (currentFlow && currentFlow.checkbox) {
+                                currentFlow.selected = currentSelectedCount === currentFlow.children.length
+                            }
+                            currentSelectedCount = 0;
+                            currentWs = node.z;
+                            var parent = RED.nodes.workspace(currentWs) || RED.nodes.subflow(currentWs);
+                            currentFlow = {
+                                label: RED.utils.getNodeLabel(parent, currentWs),
+                            }
+                            if (!parent.disabled) {
+                                currentFlow.children = [];
+                                currentFlow.checkbox = true;
+                            } else {
+                                currentFlow.class = "disabled"
+                            }
+                            data.push(currentFlow);
+                        }
+                        if (currentFlow.children) {
+                            if (!filteredNodes[node.id]) {
+                                currentSelectedCount++;
+                            }
+                            currentFlow.children.push({
+                                label: RED.utils.getNodeLabel(node,node.id),
+                                node: {
+                                    id: node.id
+                                },
+                                checkbox: true,
+                                selected: !filteredNodes[node.id]
+                            });
+                        }
+                    });
+                    if (currentFlow && currentFlow.checkbox) {
+                        currentFlow.selected = currentSelectedCount === currentFlow.children.length
+                    }
+                    if (subWindow) {
+                        try {
+                            subWindow.postMessage({event:"refreshDebugNodeList", nodes:data},"*");
+                        } catch(err) {
+                            console.log(err);
+                        }
+                    }
+                    RED.debug.refreshDebugNodeList(data)
                 }
             };
 
@@ -427,6 +540,8 @@
                     options.messageSourceClick(msg.id,msg._alias,msg.path);
                 } else if (msg.event === "clear") {
                     options.clear();
+                } else if (msg.event === "requestDebugNodeList") {
+                    options.requestDebugNodeList(msg.filteredNodes)
                 }
             };
             window.addEventListener('message',this.handleWindowMessage);
diff --git a/packages/node_modules/@node-red/nodes/core/common/lib/debug/debug-utils.js b/packages/node_modules/@node-red/nodes/core/common/lib/debug/debug-utils.js
index 70dc33605..89b1a6241 100644
--- a/packages/node_modules/@node-red/nodes/core/common/lib/debug/debug-utils.js
+++ b/packages/node_modules/@node-red/nodes/core/common/lib/debug/debug-utils.js
@@ -167,19 +167,13 @@ RED.debug = (function() {
             var menu = RED.popover.menu({
                 options: options,
                 onselect: function(item) {
-                    if (item.value !== filterType) {
-                        filterType = item.value;
-                        $('#red-ui-sidebar-debug-filter span').text(RED._('node-red:debug.sidebar.'+filterType));
-                        refreshMessageList();
-                        RED.settings.set("debug.filter",filterType)
-                    }
+                    setFilterType(item.value)
                     if (filterType === 'filterSelected') {
-                        refreshDebugNodeList();
+                        config.requestDebugNodeList(filteredNodes);
                         filterDialog.slideDown(200);
                         filterDialogShown = true;
                         debugNodeTreeList.focus();
                     }
-
                 }
             });
             menu.show({
@@ -276,109 +270,7 @@ RED.debug = (function() {
     }
 
 
-    function refreshDebugNodeList() {
-        var workspaceOrder = RED.nodes.getWorkspaceOrder();
-        var workspaceOrderMap = {};
-        workspaceOrder.forEach(function(ws,i) {
-            workspaceOrderMap[ws] = i;
-        });
-
-        var candidateNodes = [];
-        var candidateSFs = [];
-        var subflows = {};
-        RED.nodes.eachNode(function (n) {
-            var nt = n.type;
-            if (nt === "debug") {
-                if (n.z in workspaceOrderMap) {
-                    candidateNodes.push(n);
-                }
-                else {
-                    var sf = RED.nodes.subflow(n.z);
-                    if (sf) {
-                        subflows[sf.id] = {
-                            debug: true,
-                            subflows: {}
-                        };
-                    }
-                }
-            }
-            else if(nt.substring(0, 8) === "subflow:") {
-                if (n.z in workspaceOrderMap) {
-                    candidateSFs.push(n);
-                }
-                else {
-                    var psf = RED.nodes.subflow(n.z);
-                    if (psf) {
-                        var sid = nt.substring(8);
-                        var item = subflows[psf.id];
-                        if (!item) {
-                            item = {
-                                debug: undefined,
-                                subflows: {}
-                            };
-                            subflows[psf.id] = item;
-                        }
-                        item.subflows[sid] = true;
-                    }
-                }
-            }
-        });
-        candidateSFs.forEach(function (sf) {
-            var sid = sf.type.substring(8);
-            if (containsDebug(sid, subflows)) {
-                candidateNodes.push(sf);
-            }
-        });
-
-        candidateNodes.sort(function(A,B) {
-            var wsA = workspaceOrderMap[A.z];
-            var wsB = workspaceOrderMap[B.z];
-            if (wsA !== wsB) {
-                return wsA-wsB;
-            }
-            var labelA = RED.utils.getNodeLabel(A,A.id);
-            var labelB = RED.utils.getNodeLabel(B,B.id);
-            return labelA.localeCompare(labelB);
-        });
-        var currentWs = null;
-        var data = [];
-        var currentFlow;
-        var currentSelectedCount = 0;
-        candidateNodes.forEach(function(node) {
-            if (currentWs !== node.z) {
-                if (currentFlow && currentFlow.checkbox) {
-                    currentFlow.selected = currentSelectedCount === currentFlow.children.length
-                }
-                currentSelectedCount = 0;
-                currentWs = node.z;
-                var parent = RED.nodes.workspace(currentWs) || RED.nodes.subflow(currentWs);
-                currentFlow = {
-                    label: RED.utils.getNodeLabel(parent, currentWs),
-                }
-                if (!parent.disabled) {
-                    currentFlow.children = [];
-                    currentFlow.checkbox = true;
-                } else {
-                    currentFlow.class = "disabled"
-                }
-                data.push(currentFlow);
-            }
-            if (currentFlow.children) {
-                if (!filteredNodes[node.id]) {
-                    currentSelectedCount++;
-                }
-                currentFlow.children.push({
-                    label: RED.utils.getNodeLabel(node,node.id),
-                    node: node,
-                    checkbox: true,
-                    selected: !filteredNodes[node.id]
-                });
-            }
-        });
-        if (currentFlow && currentFlow.checkbox) {
-            currentFlow.selected = currentSelectedCount === currentFlow.children.length
-        }
-
+    function refreshDebugNodeList(data) {
         debugNodeTreeList.treeList("data", data);
     }
 
@@ -401,7 +293,7 @@ RED.debug = (function() {
         },200);
     }
     function _refreshMessageList(_activeWorkspace) {
-        if (_activeWorkspace) {
+        if (typeof _activeWorkspace === 'string') {
             activeWorkspace = _activeWorkspace.replace(/\./g,"_");
         }
         if (filterType === "filterAll") {
@@ -479,12 +371,12 @@ RED.debug = (function() {
                         filteredNodes[n.id] = true;
                     });
                     delete filteredNodes[sourceId];
-                    $("#red-ui-sidebar-debug-filterSelected").trigger("click");
                     RED.settings.set('debug.filteredNodes',Object.keys(filteredNodes))
+                    setFilterType('filterSelected')
                     refreshMessageList();
                 }},
                 {id:"red-ui-debug-msg-menu-item-clear-filter",label:RED._("node-red:debug.messageMenu.clearFilter"),onselect:function(){
-                    $("#red-ui-sidebar-debug-filterAll").trigger("click");
+                    clearFilterSettings()
                     refreshMessageList();
                 }}
             );
@@ -713,9 +605,17 @@ RED.debug = (function() {
         if (!!clearFilter) {
             clearFilterSettings();
         }
-        refreshDebugNodeList();
+        config.requestDebugNodeList(filteredNodes);
     }
 
+    function setFilterType(type) {
+        if (type !== filterType) {
+            filterType = type;
+            $('#red-ui-sidebar-debug-filter span').text(RED._('node-red:debug.sidebar.'+filterType));
+            refreshMessageList();
+            RED.settings.set("debug.filter",filterType)
+        }
+    }
     function clearFilterSettings() {
         filteredNodes = {};
         filterType = 'filterAll';
@@ -728,6 +628,7 @@ RED.debug = (function() {
         init: init,
         refreshMessageList:refreshMessageList,
         handleDebugMessage: handleDebugMessage,
-        clearMessageList: clearMessageList
+        clearMessageList: clearMessageList,
+        refreshDebugNodeList: refreshDebugNodeList
     }
 })();
diff --git a/packages/node_modules/@node-red/nodes/core/common/lib/debug/debug.js b/packages/node_modules/@node-red/nodes/core/common/lib/debug/debug.js
index 792d9895a..96f31bc81 100644
--- a/packages/node_modules/@node-red/nodes/core/common/lib/debug/debug.js
+++ b/packages/node_modules/@node-red/nodes/core/common/lib/debug/debug.js
@@ -12,6 +12,9 @@ $(function() {
             },
             clear: function() {
                 window.opener.postMessage({event:"clear"},'*');
+            },
+            requestDebugNodeList: function(filteredNodes) {
+                window.opener.postMessage({event: 'requestDebugNodeList', filteredNodes},'*')
             }
         }
 
@@ -26,6 +29,8 @@ $(function() {
                     RED.debug.refreshMessageList(evt.data.activeWorkspace);
                 } else if (evt.data.event === "projectChange") {
                     RED.debug.clearMessageList(true);
+                } else if (evt.data.event === "refreshDebugNodeList") {
+                    RED.debug.refreshDebugNodeList(evt.data.nodes)
                 }
             },false);
         } catch(err) {