Cannot sync, download or export json, XML or HTML files

[dschultzca]

⚠️ Before posting ⚠️

• This is a bug, not a question or an enhancement.
• I've searched for similar issues and didn't find a duplicate.
• I've written a clear and descriptive title for this issue, not just "Bug" or "Crash".
• I agree to follow Nextcloud's Code of Conduct.

Steps to reproduce

• Create a folder (I did this via the web interface) of various file types. I have files ending with .json, .xml, .html, .zip, .aac, .mp3, .dB, .aes, etc...
• In the Android Nextcloud client request a sync of the folder containing these files. The three file types .json, .xml, .html will not be sync'd, all others sync fine
• If I request a download of a specific file it does not download
• If I export a specific file all I get is a 0-byte file with the correct name in the Downloads folder

If I use the web interface via my browser I can download these file types.

Expected behaviour

All file types should download.

Actual behaviour

Only files without .json, .xml, .html extensions will sync.

Android version

16

Device brand and model

Brax3

Stock or custom OS?

Custom (explain in "additional information")

Nextcloud android app version

34.0.0

Nextcloud server version

33.0.3

Using a reverse proxy?

No

Android logs

Don't have access to logcat to get the nextcloud.log

Server error logs

No server logs appear for this issue.

Additional information

This smartphone is a Brax3 running iodéOS 7.5-20260519-brax3 with the Nextcloud Android client from f-Droid.
I have an older Samsung S9 (Android 10) with the same Nextcloud Android client version which has the same issue, but did not have this issue with version 33.1.2.
[edit] The same issue happens with my Samsung tablet (Android 12).