Android permission errors pile up for files blocked with Flow - File access control

[solarjoe]

Steps to reproduce

1. Block file upload on the server with a Flow- File access control for a file on Android device
2. Wait

The issue is similar to #6570

see image
#6570 (comment)

Expected behaviour

No permission errors should pile up

Actual behaviour

"Permission errors when writing to folder" or "Permission error" pile up on Android

Environment data

Android version: 10

Device model: Nokia

Stock or customized system: Stock

Nextcloud app version: 3.16.1

Nextcloud server version: 20.0.9

Is there a solution to this?

[solarjoe]

Always 22 notifications pile up. Not sure if this is related to Android or NC app.

[rarealphacat]

same behavior here. I was unable to upload aac files directly from Android to NC, no problem with my auto upload folder though. First I thought it was due to the file name characters, renamed still couldn't upload.
Then I changed the file format from aac to mp3 manually and it works!
I wonder if NC has a list of file format whitelist.