Description

When scrolling on the page and I hover to reveal an inserter, the inserter becomes fixed while I would expect it to scroll with the rest of the content.

It just feels jumpy when it doesn't stick to the place:

FYI @jasmussen perhaps this started after making the appender fixed in #36605 ?

Step-by-step reproduction instructions

• Go to site editor
• Reveal inserter by mouse hover and scroll with mouse scroll wheel

Screenshots, screen recording, code snippet

No response

Environment info

• Gutenberg v12.0.1
• Firefox 94 MacOS

Please confirm that you have searched existing issues in the repo.

Yes

Please confirm that you have tested with all plugins deactivated except Gutenberg.

No