Nextcloud app not shown as Content Provider

Nextcloud app is not shown as content provider for other apps.
It was shown before but out of the blue, it disappeared.

I recently bought a new phone, when I reinstalled all apps and accounts, nextcloud was shown as an option to select a file from when I asked to open a file. Then I noticed that on the old phone it was not available.

Two days with the new phone and the app is not showing anymore, only Drive and Dropbox are showing.

I had a keepass database opened in KeePassDX and it is available with “content://…” address, but I cannot open another one

I uninstalled nextcloud, deleted the account from the smartphone and updated nextcloud android client to 3.15.1 to no avail.

On Instagram, for example, if I try to upload a photo, I can choose from Drive, Dropbox, Photos,FX File Chooser, OneDrive, Galery and others… but no nextcloud

Samsung Galaxy S21, Android 11, OneUI 3.1

Just installed nextcloud dev from f-droid
It’s working fine

It seems this problem came back. However, the solution is also the same: install nextcloud dev and it’s working.