I have observed this anomaly, that the "last access time" in admin panel changes after 24 hours from the first login of the day, even if the user logs...

I think this is caused by running out of RAM. After upgrade of RAM from 6GB to 10GB it is working normally. Thank you, Hendra

log carbonio.log:Oct 22 00:45:37 mail postfix/smtpd[2025234]: disconnect from localhost[127.0.0.1] commands=0/0Oct 22 00:45:41 mail amavis-mc[2029326]...