[Bug]: cropping an image leads to multiple errors and undesired outcome

⚠️ 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.

Steps to reproduce

I did this on c nc com:

3. in files, click on an image
4. resize it
5. try to overwrite it (save with the same name as original)- button confirming that I want to overwrite has wrong color, text hard to read - I heard a fix for this is underway

• saving failed

• then I tried again with a different file name, again an error

• back in files list: where is the image I just worked with? is it necessary to reload the page to see the file?
• after reload I see that actually both files were written but in very low quality, I don't think I told the editor to downsize quality?
• all very confusing

Expected behavior

• it works, no errors
• file should be visible in file list immediately after the editor closes, no reload necessary
• file has same quality as original file

Nextcloud Server version

34 (master)

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 image resize and save flow in the Nextcloud Files viewer, testing both overwriting the original and saving under a new name. Check the reported save errors, file-list refresh behavior, overwrite confirmation styling, and resulting image quality; done means both saves succeed, the file appears without reloading, and quality is preserved.