Bug: Caret disappears after using DraggableBlockPlugin in playground - in Firefox specifically

Using the drag block in Firefox from the DraggableBlockPlugin in Lexical playground causes caret to disappear. Attempts to bring it back by clicking in editor fail. Only switching tabs brings caret back.

Lexical version: 0.34.0

## Steps To Reproduce

1. Open Lexical Playground in Firefox: https://playground.lexical.dev/
2. Use draggable block to move any text
3. Caret disappears. Any click on editor does not bring the caret back. (Switching tabs brings it back)

Firefox version 141.0.2
Mac OS 12.6

## The current behavior
Caret disappears on using draggable block.
## The expected behavior
Caret should reappear after dragging, like in Chrome.

## Impact of fix
Poor UX experience for Firefox users.