Since one week i have problems with my Quest. I played HL: Alyx for about 4 hours. Then the quest hung up. The Quest was already very hot, I took a break overnight.
The next day I wanted to play Beat Saber but the tracking jerky and the game was lagging.
First of all, do you play BeatSaber via Link or native when it's lagging? Is the Tracking also lagging in the Quest Home or other Quest apps?
When you play via Link, are you sure that you don't use too high graphic settings? Lags via Link normally occur when the GPU is limiting and not because the Quest tracking is not working properl. Try reducing graphic settings and supersampling.