The main display that shows your speed,etc. randomly shutting down
I know two people who had this exact issue with their new-gen Golf. First cause was the French language would crash the whole dash if you cycled the dashboard views (to my knowledge they never fixed the issue and the workaround is to set the car to English). Second cause was a malformed JPEG from a radio station would cause the dash to bootloop until you drove far enough from said radio station, which would allow the car to work long enough to disable that feature (IIRC).
So yeah, QA is down the fucking drain with VW on their latest gen. They had a new CEO, and now a new one again I think? But the reputational damage has been done. Too bad, I really liked my '18 Polo.