Nextcloud version (eg, 20.0.5): 21.0.1
Operating system and version (eg, Ubuntu 20.04): Debian 10
Apache or nginx version (eg, Apache 2.4.25): Apache/2.4.38
PHP version (eg, 7.4): PHP 7.4
Actually, we are facing a problem with our NextCloud installation.
We got NextCloud instance on our own Debian server, then we are syncing the files to our private Windows Server, where the files are stored too (like some double backup).
We got around 15 accounts connected to this server.
And the big problem is, sometimes the NextCloud just randomly deleting some folders from the server. The deleted folders are then in the trash bin, and from the Activity log we see, these files are deleting by a random account. This error with deleting files happened like 20 times in the last 2 months.
We got the latest version of NC on the server, even the latest Clients installed.
Can you give us some hint, where can be the problem and we should look for?
Thanks a lot.