I have Notepad pinned to my toolbar. Before the change to 4.0, the Notepad icon was accessible in modal task view. The icon remains accessible in full screen and sidebar task view layout in 4.0; it's only modal that doesn't show it.

The N or P keyboard shortcut does not work on that view, either, despite working elsewhere.

I heavily use Notepad to store self-made text templates to copy and paste into task comments since comment/text-only template types are not currently supported in ClickUp. Since 4.0, I have to click out of modal task view to access the Notepad, copy the note, open the task, and paste it in.