Existing Files not accessible anymore after applying File MIME type filter

Dear community,

I am facing a weird issue with the file workflow / access control feature.
I am using the version 22.1.1 of nextcloud.
I have a properly working server with some files on it.
From there I would like to prevent uploading uncompressed files.
When I activate the access control, the filter for uploading works properly : I cant upload files that do not have the proper extension.
However I cannot access anymore to the existing files, although I have the proper rights . I get a “Operation Deinied” pop-daown on the top right hand corner that redirect me to my home page.
The existing files are a mixed type of files.
Any clue on such behavior?