C11 or 12: Generic Remote Bug/Crash?

I create a GR with ‘move cursor to next event’

I then use a repeating midi event @ 400ms intervals and get a crash ie its skipping the cursor across selected events in midi editor

But does not happen consistently?

Its stopped atm…before I got screen shot of ‘Serious error’ dialog
i7 9700, 8mg ram w10 latest
Cubase 11 or 12 latest