diff --git a/packages/node_modules/@node-red/editor-client/src/js/ui/editors/expression.js b/packages/node_modules/@node-red/editor-client/src/js/ui/editors/expression.js
index 64dec3a62..0d6065d84 100644
--- a/packages/node_modules/@node-red/editor-client/src/js/ui/editors/expression.js
+++ b/packages/node_modules/@node-red/editor-client/src/js/ui/editors/expression.js
@@ -121,73 +121,75 @@
                     var currentFunctionMarker = null;
 
                     expressionEditor.getSession().setValue(value||"",-1);
-                    expressionEditor.on("changeSelection", function() {
-                        var c = expressionEditor.getCursorPosition();
-                        var token = expressionEditor.getSession().getTokenAt(c.row,c.column);
-                        if (token !== currentToken || (token && /paren/.test(token.type) && c.column !== currentTokenPos)) {
-                            currentToken = token;
-                            var r,p;
-                            var scopedFunction = null;
-                            if (token && token.type === 'keyword') {
-                                r = c.row;
-                                scopedFunction = token;
-                            } else {
-                                var depth = 0;
-                                var next = false;
-                                if (token) {
-                                    if (token.type === 'paren.rparen') {
-                                        // If this is a block of parens ')))', set
-                                        // depth to offset against the cursor position
-                                        // within the block
-                                        currentTokenPos = c.column;
-                                        depth = c.column - (token.start + token.value.length);
-                                    }
+                    //ace only (monaco has jsonata tokeniser)
+                    if(expressionEditor.type == "ace") {
+                        expressionEditor.on("changeSelection", function() {
+                            var c = expressionEditor.getCursorPosition();
+                            var token = expressionEditor.getSession().getTokenAt(c.row,c.column);
+                            if (token !== currentToken || (token && /paren/.test(token.type) && c.column !== currentTokenPos)) {
+                                currentToken = token;
+                                var r,p;
+                                var scopedFunction = null;
+                                if (token && token.type === 'keyword') {
                                     r = c.row;
-                                    p = token.index;
+                                    scopedFunction = token;
                                 } else {
-                                    r = c.row-1;
-                                    p = -1;
-                                }
-                                while ( scopedFunction === null && r > -1) {
-                                    var rowTokens = expressionEditor.getSession().getTokens(r);
-                                    if (p === -1) {
-                                        p = rowTokens.length-1;
+                                    var depth = 0;
+                                    var next = false;
+                                    if (token) {
+                                        if (token.type === 'paren.rparen') {
+                                            // If this is a block of parens ')))', set
+                                            // depth to offset against the cursor position
+                                            // within the block
+                                            currentTokenPos = c.column;
+                                            depth = c.column - (token.start + token.value.length);
+                                        }
+                                        r = c.row;
+                                        p = token.index;
+                                    } else {
+                                        r = c.row-1;
+                                        p = -1;
                                     }
-                                    while (p > -1) {
-                                        var type = rowTokens[p].type;
-                                        if (next) {
-                                            if (type === 'keyword') {
-                                                scopedFunction = rowTokens[p];
-                                                // console.log("HIT",scopedFunction);
-                                                break;
+                                    while ( scopedFunction === null && r > -1) {
+                                        var rowTokens = expressionEditor.getSession().getTokens(r);
+                                        if (p === -1) {
+                                            p = rowTokens.length-1;
+                                        }
+                                        while (p > -1) {
+                                            var type = rowTokens[p].type;
+                                            if (next) {
+                                                if (type === 'keyword') {
+                                                    scopedFunction = rowTokens[p];
+                                                    // console.log("HIT",scopedFunction);
+                                                    break;
+                                                }
+                                                next = false;
                                             }
-                                            next = false;
+                                            if (type === 'paren.lparen') {
+                                                depth-=rowTokens[p].value.length;
+                                            } else if (type === 'paren.rparen') {
+                                                depth+=rowTokens[p].value.length;
+                                            }
+                                            if (depth < 0) {
+                                                next = true;
+                                                depth = 0;
+                                            }
+                                            // console.log(r,p,depth,next,rowTokens[p]);
+                                            p--;
                                         }
-                                        if (type === 'paren.lparen') {
-                                            depth-=rowTokens[p].value.length;
-                                        } else if (type === 'paren.rparen') {
-                                            depth+=rowTokens[p].value.length;
+                                        if (!scopedFunction) {
+                                            r--;
                                         }
-                                        if (depth < 0) {
-                                            next = true;
-                                            depth = 0;
-                                        }
-                                        // console.log(r,p,depth,next,rowTokens[p]);
-                                        p--;
-                                    }
-                                    if (!scopedFunction) {
-                                        r--;
                                     }
                                 }
+                                expressionEditor.session.removeMarker(currentFunctionMarker);
+                                if (scopedFunction) {
+                                //console.log(token,.map(function(t) { return t.type}));
+                                    funcSelect.val(scopedFunction.value).trigger("change");
+                                }
                             }
-                            expressionEditor.session.removeMarker(currentFunctionMarker);
-                            if (scopedFunction) {
-                            //console.log(token,.map(function(t) { return t.type}));
-                                funcSelect.val(scopedFunction.value).trigger("change");
-                            }
-                        }
-                    });
-
+                        });
+                    }
                     dialogForm.i18n();
                     $("#red-ui-editor-type-expression-func-insert").on("click", function(e) {
                         e.preventDefault();