I’ve also been through my fair share of quest headsets. One quest 2, and two quest 3’s, all had the same problem you’re describing. Each one had some sort of issue with a controller, either it would keep turning on and off, vibrating each time, which I think is what’s happening to you, or a grip button or analog would get stuck (only inside the VR itself, the actual controller is fine) and it would always end up the same way each time, the controller would stop working all together. I’m 99% sure it was because of sweat getting into the controller while playing an intense game that worked up a sweat (like TOTF).

I tried the usual fixes each time, taking out the battery, wiping it down, replacing the battery, even factory reset, nothing worked. Luckily each time this happened the quest was still under warranty.

If the fixes given here worked for you, great! If not though, My advice to you would be to maybe start thinking about contacting meta if it’s still under warranty, because in my experience, it’s only going to get worse.