Just thought I would share this here in case anyone else runs into it or has indeed seen this issue.
With Veeam 9.5 U3 I have run into an issue when running a Sure backup job, at the point Veeam updates the recovered VM in the Sure Backup job, the VBR server BSODS. This particular backup job is for domain controllers and initiating an authoritative restore.
The cause of the issue seems to be Trend Deep Security Agent. Disabling Trend protection on the Veeam B&R server allows the Sure backup job to run successfully.
I will try and figure out what process is causing the server to BSOD with AV enabled.