Idle time lockout

I am having an issue with being logged out way too soon, although this seems to be happening on another account without full admin rights, (belonging to another user)
am using docker version 2.0.
Also to point out , the xibo cms has been configured to be accessed by an alias url as opposed to the fqdn, so the alias resolves to the ip address or fqdn, i was reading somewhere that this can contribute to this kind of behavior and sometimes after idle time out and trying to get back to the url , its a dead end unless i use the ip address then am back in. Can one use an alias name? is it recommended? or ip address is preferred
Thank you for your support