Comment # 1 on bug 1065914 from Dominique Leuenberger

The system name is likely set by a DHCP Server (which, in a university, I'd not
even be surprised if it's a rogue one)

You can disable this behavior in YaST - System - Network Settings - Hostname
settings (assign DHCP name)

Please adjust the systemd journal (journalctl) from around the time you were at
the univeristy

Also: are you using NetworkManager or wicked?