Multiple reverse DNS record internal DNS
We see from your output that IP address was changed from 126.96.36.199 to 188.8.131.52. This is not a big problem if you use DHCP. But this is very uncommon behavior if you use DHCP on Windows Server - it keeps leasing info by default, so you have a big chance that your DHCP pool is over.
I think most likely a DHCP issue. Possibly you have multiple servers/devices with DHCP role leasing IP's with same network range (Maybe a Router has DHCP role as well as Windows Server), your servers/printers don't have static IP or reservation or your DHCP server leases IP addresses for too short a time. Does the event log on DHCP server have any entries that stand out as possible cause?