Systems freeze randomly [Fatal]

This is a horrible issue which I've had twice now where all crucial systems freeze functionality and the screens move eerily while the plane is uncontrollable.

While the issue doesn't appear bad at first you quickly realise there is also no control of the plane itself. I couldn't disengage AP and fly it manually as pressing the buttons did not do anything, neither did cycling the battery, switching displays or anything you might expect would solve the problem physically. This is definitely a bug and I dread to even imagine this happening in real life as it would be fatal.

The only other time I've ever had this same issue occur was right at the beginning of FS2024 in the A320 V2 but I was still able to land as it occurred right on approach and I still had control of the systems. I've also had similar freezes on the A330 trying to use the SEC FPL option or simply during flights consecutively where the screens would simply stop responding and once turned orange with a WASM fault occurred message. The issue now seems to have manifested itself on the A350 and results in complete control loss.

Spoiler: The plane kept descending in a straight line, off the approach, and eventually crashed into the ocean about 8 minutes later. Kind of haunting..

I'm pretty certain this is not a system error relating to my PC since it doesn't behave as such and the thing is still running. I've had many successful flights in the A350 and that includes ones which were +12 hours with successful landings. This issue occurred after 4 hours and usually occurs after 2-3 hours.

Edited 8 hours ago8 hr by cr4
Got time estimation wrong (4 hours not 6 hours flight)