Getting similar behavior. Sometimes AirPods connect and disconnect after few seconds. Even when they do connect, they often don't make the typical "connected" sound. Also some apps continue to go through speakers even though status bar shows AirPods as connected. E.g., noticing this with Messages app playing incoming message sounds through speakers while the Music app is indeed playing through AirPods. Very unreliable and bad experience in Bug Sur.

Issue is still happening for me. Trying to add the build for review returns App Store Connect error (Network inspector) "status" : "409", "code" : "STATE_ERROR.BUILD_INDICATES_GAME_CENTER_DISABLED", "title" : "Your build indicates game center is disabled.", "detail" : "Your appStoreVersion has gameCenterConfigurations relationship but build is missing com.apple.developer.game-center key." The game center entitlement though does exist in the build - going to the selected build details in App Store Connect shows it's there and set to true. Re-enabling capability does not work, re-enabling automatic signing does not work, Xcode is setup properly.

In case it helps anyone who faces this issue but their app is actually using Game Center: My app's main target (the only one using Game Center functionality) had everything set up fine (App ID/entitlements file/capabilities). I took a look at my WatchKit app and WatchKit app extension targets and that turned out to be the issue - even though my app does not use Game Center on the watch. In developer portal, I turned Game Center on for both WatchKit app and WatchKit extension IDs (under Certificates, Identifiers & Profiles -> Identifiers) In Xcode, I turned on the Game Center capability in the WatchKit extension target (which in turn created an .entitlements file for that target) I forced a re-creation of the automatically managed provision profiles (deleted everything under ~/Library/MobileDevice/Provisioning\ Profiles) Uploading a new build had no issue anymore and I could successfully submit the app.