Do you have the same issue if you follow the OP’s steps to reproduce it?
Yes
Provide extra information to complete the original description of the issue:
No warning, just goes dark. No way to fix in-flight, generator failure light is never lit.
If relevant, provide additional screenshots/video:
n/a
It’s a real shame as this plane feels really good when flying (if not with a super sensitive throttle) and has a good autopilot.