Problem with SSH key login when FTP user added to site

CloudPanel version(s) affected

v2.4.1

Description

Problem with SSH login via keys when FTP account is created

How to reproduce

Today I ran into the problem that I could not log in under SSH user of an added site through SSH keys.

The keys were added via cloudpanel (but even when I added them directly via sftp to authorized_keys no change)
chown was set correctly on the user
chmod of the .ssh folder was at 0700
chmod .ssh/authorized_keys was at 0600 in short, everything that should be so looked fine. But the /var/log/auth.log still showed "sshd[1036517]: Authentication refused: bad ownership or modes for directory"

I didn't know what to try anymore, so I tried deleting the FTP account created for this site and then the login worked. Probably somehow the permissions of the created FTP account are confused with the SSH account??? I guess, I don't know honestly. :-D

Possible Solution

No response

Additional Context