Weird issue on focus change

[Bishwas-py]

Here's the issue:

Uncaught TypeError: Cannot read properties of null (reading 'contains')
    at HTMLDocument.onFocusChange (@friendofsvelte_tipex.js?v=84a7d262:1874:55)

onMount(async () => {
    const onFocusChange = function() {
      $$invalidate(1, isEditorFocused = editorsParent.contains(document.activeElement));
    };
    onFocusChange();
    document.addEventListener("focusin", onFocusChange);
    document.addEventListener("focusout", onFocusChange);
  });

[Bishwas-py]

Fixed on 0.0.1-act.11