diff --git a/webapp/packages/core-app/src/shared/NodesManager/ConnectionDialogsService.ts b/webapp/packages/core-app/src/shared/NodesManager/ConnectionDialogsService.ts
index 518be18daf..006bf32a81 100644
--- a/webapp/packages/core-app/src/shared/NodesManager/ConnectionDialogsService.ts
+++ b/webapp/packages/core-app/src/shared/NodesManager/ConnectionDialogsService.ts
@@ -46,6 +46,7 @@ export class ConnectionDialogsService {
         order: 2,
         title: 'app_shared_connectionMenu_disconnect',
         onClick: () => this.connectionsManagerService.closeAllConnections(),
+        isDisabled: () => !this.connectionsManagerService.hasAnyConnection(true),
       }
     );
 
diff --git a/webapp/packages/core-connections/src/ConnectionsManagerService.ts b/webapp/packages/core-connections/src/ConnectionsManagerService.ts
index aa3b499bb9..48184d2187 100644
--- a/webapp/packages/core-connections/src/ConnectionsManagerService.ts
+++ b/webapp/packages/core-connections/src/ConnectionsManagerService.ts
@@ -83,7 +83,10 @@ export class ConnectionsManagerService {
     await this.afterConnectionClose(id);
   }
 
-  hasAnyConnection(): boolean {
+  hasAnyConnection(connected?: boolean): boolean {
+    if (connected) {
+      return Array.from(this.connectionInfo.data.values()).some(connection => connection.connected);
+    }
     return !!Array.from(this.connectionInfo.data.values()).length;
   }
 
diff --git a/webapp/packages/plugin-data-spreadsheet/src/AgGridTable/AgGridTableController.ts b/webapp/packages/plugin-data-spreadsheet/src/AgGridTable/AgGridTableController.ts
index e7b407f994..19259f3a40 100644
--- a/webapp/packages/plugin-data-spreadsheet/src/AgGridTable/AgGridTableController.ts
+++ b/webapp/packages/plugin-data-spreadsheet/src/AgGridTable/AgGridTableController.ts
@@ -99,6 +99,7 @@ export class AgGridTableController implements IInitializableController, IDestruc
 
     this.subscriptions.push(gridModel.tableDataModel.onRowsUpdate.subscribe(this.updateRows.bind(this)));
     this.subscriptions.push(gridModel.tableEditor.onRowsUpdate.subscribe(this.updateRows.bind(this)));
+    this.subscriptions.push(gridModel.tableEditor.onCancelChanges.subscribe(this.cancelEditing.bind(this)));
     this.subscriptions.push(gridModel.onChunkSizeChange.subscribe(this.changeChunkSize.bind(this)));
     this.subscriptions.push(gridModel.onReset.subscribe(this.resetData.bind(this)));
   }
@@ -165,6 +166,12 @@ export class AgGridTableController implements IInitializableController, IDestruc
     return this.gridModel.isCellEdited(rowIndex, column);
   }
 
+  private cancelEditing() {
+    if (this.api) {
+      this.api.stopEditing(true);
+    }
+  }
+
   private updateRows(rows: number[]) {
     if (this.api) {
       const updatedRows: RowNode[] = [];
diff --git a/webapp/packages/plugin-data-viewer/src/TableViewer/TableDataModel/TableEditor.ts b/webapp/packages/plugin-data-viewer/src/TableViewer/TableDataModel/TableEditor.ts
index 8d40659787..7502cb0691 100644
--- a/webapp/packages/plugin-data-viewer/src/TableViewer/TableDataModel/TableEditor.ts
+++ b/webapp/packages/plugin-data-viewer/src/TableViewer/TableDataModel/TableEditor.ts
@@ -18,13 +18,17 @@ import { TableRow, SomeTableRows } from './TableRow';
  */
 export class TableEditor {
   readonly onRowsUpdate: Observable<number[]>
+  readonly onCancelChanges: Observable<null>
 
   @observable private editedRows = new Map<number, EditedRow>();
   private rowsUpdateSubject: Subject<number[]>
+  private cancelChangesSubject: Subject<null>
 
   constructor(private dataModel: TableDataModel) {
     this.rowsUpdateSubject = new Subject();
+    this.cancelChangesSubject = new Subject();
     this.onRowsUpdate = this.rowsUpdateSubject.asObservable();
+    this.onCancelChanges = this.cancelChangesSubject.asObservable();
   }
 
   /**
@@ -120,6 +124,7 @@ export class TableEditor {
     const rows = Array.from(this.editedRows.keys());
     this.editedRows.clear();
     if (!skipUpdate) {
+      this.cancelChangesSubject.next(null);
       this.rowsUpdateSubject.next(rows);
     }
   }