I've just upgraded my primary servers to 11.3.1 and I have now a boring issue. As soon as I start an imaging task, the workstation restarts after step 1 on 6.
I tried the 6 steps of my tasks from command line and that works perfectly.

I tried again with a test image bundle with only 3 steps, same issue.

Issue occurs on both virtual or physical workstations.

Imaging drivers are up to date.
FRU1 has been applied as well.

SR have been opened to support but if you have an idea, I'll appreciate your feedback.