Debugging on iOS 14.6 fails, xCode 12.5

Qt 5.15.2 + Mac OS X Big Sur(latest) + iOS 14.6

ok so we've updated our phones to 14.6 and all of the sudden unable to work since debugger won't connect. Deployment succeeds. First there were errors about Qt Creator being unable to connect to port 30001, we've experienced this in the past so disabled QML debugging in project's settings which usually used to make everything fine (including QML debugging surprisingly). But now when we disable QML debugging the app gets deployed launched and the app's log hangs indefinitely at 'handleNewRelayConnection' red slogan.

Without QML debugging enabled that's what we get:

// handleNewRelayConnection
setting up relayer for new connection

 it stops at that.

With it enabled:

// TransferAppSession(6afa5998ad2a0a2c7919b232eaf6ccc0e4ca24f2, /Users/anonymous/Documents/AppName/build-AppName-Qt_5_15_2_for_iOS-Debug/Debug-iphoneos/AppName.app)connectByPort on device 6afa5998ad2a0a2c7919b232eaf6ccc0e4ca24f2 port 30001 failed, AMDeviceStartService returned 61

These keep going indefinitely until timeout and the app gets killed.