Video Embeds set to aligh left disappear in Gutenberg editor

[stinkykong]

With multiple themes, I find video embed blocks (both YouTube and Vimeo) disappear from view when set to align left. If set to align center, they seem to appear. Either way, they work in the public view, just not in the editor. This is since v5.5 core update.

[joostdevalk]

Replicated this on Chaplin and after that on TwentyTwenty....

Not sure we'll be able to fix before 5.5.1 but it's a bug for sure.

[stinkykong]

Ok. Thanks for the verification.

[desrosj]

Because ​5.5.1 is a shorter release cycle and this does not yet have a patch, I'm going to punt. If someone is able to give this the attention it needs before 5.5.1, it can be moved back.

[aristath]

This is an issue with the embed block's editor styles so I submitted a pull-request in Gutenberg: ​https://github.com/WordPress/gutenberg/pull/24847
When tested & verified we can backport it in core.

[audrasjb]

Thanks for the PR. To help this to move forward, I think it would be nice to add some before/after screenshot in the PR :)

[stinkykong]

I can't really use screenshots to show something that isn't visible but I created a short video to demonstrate visually what is happening when the videos disappear in the editing window.

​https://vimeo.com/468734592/5f47a4d573

[whyisjake]

Checking with @noisysocks to see if this is a viable candidate for 5.5.2.

[noisysocks]

Yep, should be OK. I'll review GB24847 and commit it to the 5.5 branch as part of #51659.

[noisysocks]

In 49372:

Editor: Update packages

@wordpress/block-directory: 1.13.7 -> 1.13.8
@wordpress/block-editor: 4.3.7 -> 4.3.8
@wordpress/block-library: 2.22.7 -> 2.22.8
@wordpress/blocks: 6.20.3 -> 6.20.4
@wordpress/components: 10.0.6 -> 10.0.7
@wordpress/core-data: 2.20.3 -> 2.20.4
@wordpress/edit-post: 3.21.7 -> 3.21.8
@wordpress/editor: 9.20.7 -> 9.20.8
@wordpress/format-library: 1.22.7 -> 1.22.8
@wordpress/icons: 2.4.0 -> 2.4.1
@wordpress/list-reusable-blocks: 1.21.6 -> 1.21.7
@wordpress/nux: 3.20.6 -> 3.20.7
@wordpress/plugins: 2.20.3 -> 2.20.4
@wordpress/server-side-render: 1.16.6 -> 1.16.7

Props talldanwp.
See #51659, #51053, #50949.