Screen shaking when mousing over a theme panel with browser width larger than 1907 pixels.

[olein]

In an environment with WordPress 5.8 RC1 installed, open the Select Theme screen from Appearance.

When the browser width is set to 1907 pixels or more and I mouse over the theme panel, each theme displayed behaves as if it is shaking.

Perhaps it's something to do with the scroll bars.

Please see below for a limited recording of the problem.

​https://youtu.be/u5jW7uGafD0

[milana_cap]

This one could be related ​https://github.com/WordPress/gutenberg/issues/32851

[desrosj]

I have not been able to reproduce this one.

@olein Can you see if you are able to reproduce this with a default theme active (such as Twenty Twenty-One)? Also, can you confirm there are no plugins active?

Adding a close suggestion as it worksforme.

[olein]

@desrosj

I checked the confirmation again and recorded the screen.

The browser width is checked at 1910 pixels. I think it is about 1908 pixels as a border. I was able to confirm the behavior when I activated the default theme.

After that, the screen confirms that all plugins are disabled.

I then switch the plugins to a different default theme, but I did not see the behavior in question at the time the alert was displayed.

However, it was reproduced when I reloaded the screen.

When I switched back to the original default theme, the same behavior was not reproduced when the alert was on, but was reproduced when I reloaded and the alert was hidden.

​https://youtu.be/fwX_vVh25Mc

[desrosj]

Thanks for re-checking @olein. I'm still unable to reproduce. I've tried in Chrome and Firefox.

Have you been able to try with different browsers to see if you only experience the issue in certain ones?

[sabernhardt]

I've seen similar in both Chrome and Edge (Chromium), at various browser sizes: #53478

Please feel free to comment on and/or follow that ticket.

[hellofromTonya]

Removing needs-testing to remove it from the testing queue. Work will continue in ticket #53478.