First off, this is your 4th identical post. Double posting is against forum rules…the ones you agreed to when you signed up. It only confuses and irritates folks trying to help or follow a thread.
Likewise, so is quadruple posting.
I suspect the reason you haven’t received help is that no one has any idea where to begin.
We don’t even know your OS, let alone your chipset, your set up and drivers, etc., etc.
Is this behavior totally random as you suggest and confined only to Fab?
The devil’s in the details.