Regression: can no longer activate block by clicking in the top area

[ktmn]

Describe the bug
You can no longer activate a block when clicking in the green area indicated on the image:

Video of current Frontenberg (Gutenberg 4.5.0):

Can only select a paragraph by clicking on the rich text directly.

Video of Gutenberg 4.1.1:

Could select the paragraph by clicking whereever the blue border hover effect appears.

In some nested block scenarios there is very little area available to click to select a "parent" block:

forcing the use of Block Navigation item in the top toolbar, which is somewhat cumbersome for a simple goal.

Additional context

Likely a regression of #11018

More info at #11357 (comment)

[aduth]

While technically it was created afterward, I'm going to close this in favor of #13723 as a duplicate, since there has been some conversation of specific resolutions there.

I'll copy context of your comment into the discussion for posterity.