Release notes in Testflight are blocking ATT on iOS 15

With iOS 15 update, ATT dialog stopped appearing, but it's only happening on my Testflight builds. Same versions downloaded from the App Store are working perfectly fine.

After some digging I noticed that this is only happening for those builds that have release notes. When I open the app, the app is asking for ATT, but at the same time Testflight displays popup with information what to test.

Has anyone else encountered such behaviour? Any fixes for it, or should I just ignore it on Testflight and hope that on AppStore it will work just fine?