Check your Windows Registry
Computer\HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Kdc
• KdcUseClientAddresses was set to 1 (default: 0)
• KdcUseClientNETBIOSAddresses was set to 1 (default: 0)
Put them back to 0 or delete or rename them.
Restart KDC service & Windows client sessions to ensure fresh TGT's are used.