Issue Why does Plesk installation kills webmin tls?

[Linulex]

Can someone explane why Plesk obsidian installation changes /etc/pam.d/webmin from

#%PAM-1.0
auth required pam_unix.so nullok
account required pam_unix.so
session required pam_unix.so

to

#%PAM-1.0
auth sufficient pam_unix.so nullok
auth required pam_plesk.so try_first_pass
account required pam_unix.so
session required pam_unix.so

The proof that this was changed by plesk is the presence of the file

/etc/pam.d/.webmin.saved_by_psa

also present in /etc/pam.d/ are:
.fingerprint-auth-ac.saved_by_psa
.password-auth-ac.saved_by_psa
.system-auth-ac.saved_by_psa

and the original where changed by plesk

I have not yet found if these mess up other systems, like the webmin change messed up webmin.

Regards
Jan