Grey gap at bottom of screen when scrolling

[karmatosed]

Currently when you scroll the following is seen - using Firefox:

This looks like it's not happening until the following PR.

The solution is to not have the gap, I will investigate this in a PR, but posting as it's existing issue and initially didn't fix by doing a simple revert on my install so creating this issue for deeper investigation.

Props @jasmussen for noting this.

[tellthemachines]

I don't think this was caused by #26944, because that one was backported to 5.6 and this issue isn't happening on 5.6 RC1.

I supect the culprit to be #27035, particularly this line that applies height: 100% to block-editor-writing-flow__click-redirect (if the height is applied only to editor-styles-wrapper the issue disappears).

[jasmussen]

Created a fix in #27187.

[karmatosed]

Ah @tellthemachines the backporting makes sense why I was having issue tracking this down, thank you so much for context there. Time travelling back through PRs got me there but it now makes sense why it was misleading - sorry poor PR it wasn't your fault!