CKEditor5 Fullscreen not working when using Safari

I was just on a Zoom call with a client and the fullscreen option did not work for them in Firefox (Windows). I'm having no issues with Firefox, Chrome, or Safari on my Mac (Sonoma 14.2.1).

For me Fullscreen is Safari is working, and I have this setup:

• Drupal core updated from D 10.2.1 => D 10.2.2
• Gin Admin Theme updated from 3.0.0-rc7 => 3.0.0-rc8

Thanks @davedg629, I was able to replicate some erratic behaviour across browsers - it looks like the Drupal.displace library used by the toolbar in 10.x is causing the behaviour. I've updated the latest dev → version to try to remedy the issue.

Assuming this works as expected, I'll have to assess how Drupal.displace is used in core 9.x, but that's a later task.

Didn't go quite far enough with the last dev version, so I've made some changes. Can you try the latest dev version → and see if it's resolved? I now get consistent placement and behaviour in Chrome, Firefox and Safari using Gin and Claro admin themes.

I installed the dev version of the module. My client tested in Firefox on her Windows computer and it's still not working for them.