diff --git a/apps/spreadsheeteditor/main/app/controller/DocumentHolder.js b/apps/spreadsheeteditor/main/app/controller/DocumentHolder.js
index 5e00f02b2..23adfc909 100644
--- a/apps/spreadsheeteditor/main/app/controller/DocumentHolder.js
+++ b/apps/spreadsheeteditor/main/app/controller/DocumentHolder.js
@@ -680,10 +680,12 @@ define([
                     cellinfo = this.api.asc_getCellInfo();
                 if (controller) {
                     var comments = cellinfo.asc_getComments();
-                    if (comments.length) {
-                        controller.onEditComments(comments);
-                    } else if (this.permissions.canCoAuthoring) {
-                        controller.addDummyComment();
+                    if (comments) {
+                        if (comments.length) {
+                            controller.onEditComments(comments);
+                        } else if (this.permissions.canCoAuthoring) {
+                            controller.addDummyComment();
+                        }
                     }
                 }
             }
@@ -1981,9 +1983,9 @@ define([
                 documentHolder.pmiFreezePanes.setCaption(this.api.asc_getSheetViewSettings().asc_getIsFreezePane() ? documentHolder.textUnFreezePanes : documentHolder.textFreezePanes);
 
                 /** coauthoring begin **/
-                var count = cellinfo.asc_getComments().length;
-                documentHolder.ssMenu.items[19].setVisible(iscellmenu && !iscelledit && this.permissions.canCoAuthoring && this.permissions.canComments && count < 1);
-                documentHolder.pmiAddComment.setVisible(iscellmenu && !iscelledit && this.permissions.canCoAuthoring && this.permissions.canComments && count < 1);
+                var celcomments = cellinfo.asc_getComments(); // celcomments===null - has comment, but no permissions to view it
+                documentHolder.ssMenu.items[19].setVisible(iscellmenu && !iscelledit && this.permissions.canCoAuthoring && this.permissions.canComments && celcomments && (celcomments.length < 1));
+                documentHolder.pmiAddComment.setVisible(iscellmenu && !iscelledit && this.permissions.canCoAuthoring && this.permissions.canComments && celcomments && (celcomments.length < 1));
                 /** coauthoring end **/
                 documentHolder.pmiCellMenuSeparator.setVisible(iscellmenu && !iscelledit || isrowmenu || iscolmenu || isallmenu);
                 documentHolder.pmiEntireHide.isrowmenu = isrowmenu;
@@ -2091,7 +2093,7 @@ define([
 
             var signProps = (signGuid) ? this.api.asc_getSignatureSetup(signGuid) : null,
                 isInSign = !!signProps && this._canProtect,
-                canComment = iscellmenu && !iscelledit && this.permissions.canCoAuthoring && this.permissions.canComments && !this._isDisabled && cellinfo.asc_getComments().length < 1;
+                canComment = iscellmenu && !iscelledit && this.permissions.canCoAuthoring && this.permissions.canComments && !this._isDisabled && cellinfo.asc_getComments() && cellinfo.asc_getComments().length < 1;
 
             documentHolder.menuViewUndo.setVisible(this.permissions.canCoAuthoring && this.permissions.canComments && !this._isDisabled);
             documentHolder.menuViewUndo.setDisabled(!this.api.asc_getCanUndo() && !this._isDisabled);
diff --git a/apps/spreadsheeteditor/main/app/controller/Toolbar.js b/apps/spreadsheeteditor/main/app/controller/Toolbar.js
index 92881e950..7d1a839ea 100644
--- a/apps/spreadsheeteditor/main/app/controller/Toolbar.js
+++ b/apps/spreadsheeteditor/main/app/controller/Toolbar.js
@@ -2843,7 +2843,8 @@ define([
                 toolbar.btnDeleteCell.menu.items[1].setDisabled(this._state.controlsdisabled.cells_down);
             }
 
-            toolbar.lockToolbar(SSE.enumLock.commentLock, (selectionType == Asc.c_oAscSelectionType.RangeCells) && (info.asc_getComments().length>0 || info.asc_getLocked()) ||
+            // info.asc_getComments()===null - has comment, but no permissions to view it
+            toolbar.lockToolbar(SSE.enumLock.commentLock, (selectionType == Asc.c_oAscSelectionType.RangeCells) && (!info.asc_getComments() || info.asc_getComments().length>0 || info.asc_getLocked()) ||
                                                           this.toolbar.mode.compatibleFeatures && (selectionType != Asc.c_oAscSelectionType.RangeCells),
                                 { array: this.btnsComment });
 
@@ -2852,7 +2853,7 @@ define([
 
         onApiSelectionChangedRestricted: function(info) {
             var selectionType = info.asc_getSelectionType();
-            this.toolbar.lockToolbar(SSE.enumLock.commentLock, (selectionType == Asc.c_oAscSelectionType.RangeCells) && (info.asc_getComments().length>0 || info.asc_getLocked()) ||
+            this.toolbar.lockToolbar(SSE.enumLock.commentLock, (selectionType == Asc.c_oAscSelectionType.RangeCells) && (!info.asc_getComments() || info.asc_getComments().length>0 || info.asc_getLocked()) ||
                                     this.appConfig && this.appConfig.compatibleFeatures && (selectionType != Asc.c_oAscSelectionType.RangeCells),
                                     { array: this.btnsComment });
         },
diff --git a/apps/spreadsheeteditor/mobile/src/controller/ContextMenu.jsx b/apps/spreadsheeteditor/mobile/src/controller/ContextMenu.jsx
index 4af867c16..86d2dffaa 100644
--- a/apps/spreadsheeteditor/mobile/src/controller/ContextMenu.jsx
+++ b/apps/spreadsheeteditor/mobile/src/controller/ContextMenu.jsx
@@ -187,7 +187,7 @@ class ContextMenu extends ContextMenuController {
 
             let iscellmenu, isrowmenu, iscolmenu, isallmenu, ischartmenu, isimagemenu, istextshapemenu, isshapemenu, istextchartmenu;
             const seltype = cellinfo.asc_getSelectionType();
-            const isComments = cellinfo.asc_getComments().length > 0; //prohibit adding multiple comments in one cell;
+            const hasComments = cellinfo.asc_getComments(); //prohibit adding multiple comments in one cell;
 
             switch (seltype) {
                 case Asc.c_oAscSelectionType.RangeCells:     iscellmenu  = true;     break;
@@ -212,14 +212,14 @@ class ContextMenu extends ContextMenuController {
                     event: 'openlink'
                 });
             }
-            if (canViewComments && isComments) {
+            if (canViewComments && hasComments && hasComments.length>0) {
                 itemsText.push({
                     caption: _t.menuViewComment,
                     event: 'viewcomment'
                 });
             }
 
-            if (iscellmenu && !api.isCellEdited && canCoAuthoring && canComments && !isComments) {
+            if (iscellmenu && !api.isCellEdited && canCoAuthoring && canComments && hasComments && hasComments.length<1) {
                 itemsText.push({
                     caption: _t.menuAddComment,
                     event: 'addcomment'
diff --git a/apps/spreadsheeteditor/mobile/src/controller/add/AddOther.jsx b/apps/spreadsheeteditor/mobile/src/controller/add/AddOther.jsx
index 85ffc2e93..b168becbe 100644
--- a/apps/spreadsheeteditor/mobile/src/controller/add/AddOther.jsx
+++ b/apps/spreadsheeteditor/mobile/src/controller/add/AddOther.jsx
@@ -22,7 +22,7 @@ class AddOtherController extends Component {
         const cellinfo = Common.EditorApi.get().asc_getCellInfo();
         const iscelllocked = cellinfo.asc_getLocked();
         const seltype = cellinfo.asc_getSelectionType();
-        const isComments = cellinfo.asc_getComments().length > 0;
+        const isComments = !cellinfo.asc_getComments() || cellinfo.asc_getComments().length > 0;
         return (!(seltype === Asc.c_oAscSelectionType.RangeCells && !iscelllocked) || isComments);
     }