[Bug]: Web - Mobile - Share - Header overlaps

⚠️ This issue respects the following points: ⚠️

• This is a bug, not a question or a configuration/webserver/proxy issue.
• This issue is not already reported on Github OR Nextcloud Community Forum (I've searched it).
• Nextcloud Server is up to date. See Maintenance and Release Schedule for supported versions.
• I agree to follow Nextcloud's Code of Conduct.

Bug description

Steps to reproduce

1. Click fullscreen
2. Disabled fullscreen again
3. Video header overlaps with the page navigation header (title is not visible anymore)
4. The second time it works

Expected behavior

Elements should be displayed correctly

Nextcloud Server version

30

Operating system

None

PHP engine version

None

Web server

None

Database engine version

None

Is this bug present after an update or on a fresh install?

None

Are you using the Nextcloud Server Encryption module?

None

What user-backends are you using?

• Default user-backend (database)
• LDAP/ Active Directory
• SSO - SAML
• Other

Configuration report

List of activated Apps

Nextcloud Signing status

Nextcloud Logs

Additional info

No response

Start by reproducing the issue in the viewer on a mobile-sized display: toggle fullscreen for a video, disable it, and observe the video header and page navigation header. The report names no files or tests; done means the title remains visible and the headers no longer overlap after toggling fullscreen.