I have been having this problem with my Q3 as well. For me, it’s only when I leave the controllers on the table for a few minutes, such as when I’m watching a movie. The controllers disconnect and then will not reconnect at all unless I remove and replace the AA battery. The battery is making good contact in the cage, and the controllers never cut out when in use. I also have hand tracking fully disabled.
Have you had any luck fixing this problem? It’s driving me crazy, and today is my last day to return this headset. I didn’t have this problem a week ago, so I feel like it’s a software thing.