[Widgets Screen] Cover Block stretches across widget area if height left unspecified

[annezazu]

Describe the bug

If you add a cover block to the new Widgets Screen without specifying height, it stretches in a fairly dramatic way on the front end of the site.

To reproduce
Steps to reproduce the behavior:

1. Install Gutenberg and activate.
2. Go to Appearance > Widgets.
3. Add a Cover Block.
4. View on the front end of the site to see it overtake the widget area.

Expected behavior

I expect the Cover Block to not take up so much space vertically.

Screenshots

Video here: https://cloudup.com/cFRDApT8p2Z

Editor version (please complete the following information):

• WordPress version: 5.5.1
• Does the website has Gutenberg plugin installed, or is it using the block editor that comes by default? Gutenberg Plugin
• If the Gutenberg plugin is installed, which version is it? 9.1.1

Desktop (please complete the following information):

• OS: MacOS
• Browser: Chrome
• Version: 86.0.4240.75

[talldan]

I wasn't able to reproduce. Just for comparison:

@annezazu result:

My result:

I tried a few different things, but wasn't able to get the cover to overlap.

[annezazu]

@talldan I found the key variable! Add more content to footer #2 that stretches down and you'll find the cover block fills in the space. Here's a video to demonstrate as this is a bit hard to explain: https://cloudup.com/csMl6wf_6pT

[talldan]

I still can't reproduce this, I have plenty of content in the second footer and the cover block still looks the same:

[Mamaduka]

I followed the steps and also not able to reproduce the issue.

Cover block has the default min-height defined in block styles. So not specifying min-height shouldn't be an issue.

[draganescu]

I also could not reproduce this. It may be one of the incipient problems which have been solved in the meantime. Given the date of the issue and the number of attempts to repro I'll close.