[Bug]: Non-image/video thumbnails disappear

[Floreum]

⚠️ Before submitting, please verify the following: ⚠️

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

Bug description

When navigating to a file, like a Blender file or a Pureref file, if the file is located inside of Nextcloud it will not show the Thumbnail. It will show the thumbnail temporarily if you have Windows Explorer opened there already and save, but the moment you refresh or navigate away the thumbnails will disappear.

Steps to reproduce

1. Navigate to a file, like a Blend file, in Windows explorer and open it
2. Save file
3. Thumbnail will appear in Windows explorer
4. Refresh the page and it will disappear

Expected behavior

Thumbnails should still be displayed like they do in Windows explorer

Which files are affected by this bug

.blend, .pur,

Operating system

Windows

Which version of the operating system you are running.

Windows 11

Package

Official Windows MSI

Nextcloud Server version

30.0.4

Nextcloud Desktop Client version

3.15.3

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

Updated from a minor version (ex. 3.4.2 to 3.4.4)

Are you using the Nextcloud Server Encryption module?

Encryption is Enabled

Are you using an external user-backend?

• Default internal user-backend
• LDAP/ Active Directory
• SSO - SAML
• Other

Nextcloud Server logs

Additional info

No response