Win Srv 2022 Guest does not properly shut down during backup.

I have a monthly backup of all VMs in my homelab. The backup works but every month one particular VM (Windows Server 2022, 128G Drive C, 4T Drive D, 16G RAM) hangs during the restart process and remains in a hung state.

In Task viewer I have the following error:



I would appreciate any guidance on how to diagnose the problem.