It’s a pretty bad bug, and to have it at launch of the OLED too really stinks. If you are using and LCD model you should be able to roll back to before 3.5 and for anyone with an OLED model we are stuck with it since we need 3.5 or newer for this model.
I hope Valve are treating this as a priority, but it does make me worry slightly since the reading up I have done on this is showing that the big has been present for quite some time in preview / beta.
Yeah it sucks. But nothing we can do right now beyond setting manual frequently. Apparently it was also seen on the Ally too which is interesting.