fiz

app/components/SimpleEditor/miniEditor/miniEditor.js

@@ -156,7 +156,7 @@ class MiniEditor extends ProseEditor {
     // If isloated note has no content and you keep pressing backspace,
     // it gets deleted. Set selection to null to prevent that
     const selection = this.editorSession.getSelection()
-    if (selection.start.offset === 0 && selection.end.offset === 0) {
+    if (selection.start && selection.start.offset === 0 && selection.end.offset === 0) {
       this.editorSession.setSelection(null)
     }