After block removal, selecting a following block sometimes also scrolls the window to the top

[sarayourfriend]

Describe the bug
When editing a long page and using the shortcut ctrl + opt + z to remove a block at the end of the page with at least two more blocks below it and then clicking on a block lower than the one you removed you’ll get scrolled up to the top of the page. It only happens sometimes though. I’m not sure what the exact conditions are to trigger it but I’m able to get it to happen semi-consistently as you can see in the video.

To reproduce
Steps to reproduce the behavior:

1. Create a new page that is long enough to need you to scoll to edit the bottom of it.
2. Add some paragraph blocks with any text in them (“asdf” will do)
3. Use the keyboard shortcut to remove the second to last block
4. Click the last block on the page (or the “Start writing…” block)

You'll see that the block you clicked is selected but sometimes you get scrolled to the top of the page.

Expected behavior
The block you clicked is now selected and in view

Screenshots
Video: https://d.pr/v/hw4ZPQ

Desktop:

• OS: macOS
• Browser: Firefox
• Version: 75.0b12

Additional context

• Version: 7.8

[sarayourfriend]

@jasmussen had some ideas about what might be going on here:

I've seen some similar jumpiness in various situations and found it equally hard to reproduce. I've seen it when entering or exiting selection mode (press Escape when editing a block).
I believe the issue is possibly related to focus briefly landing on the parent container, therefore scrolling the viewport there.

[talldan]

Possibly related to #19682.