Android 10 - Weird activity lifecycle

I have a weird issue that happens on Android 10, when I start new landscape activity, the activity below will recreate.

Assume there're two Activity classes:

ActivityA: orientation = unspecified
ActivityB: orientation = force landscape, full screen, opaque

If I start ActivityB from ActivityA, the logs of lifecycle event:

D/ActivityA: onPause() called
D/ActivityB: onCreate() called
D/ActivityB: onStart() called
D/ActivityB: onResume() called
D/ActivityA: onStop() called
D/ActivityA: onDestroy() called
D/ActivityA: onCreate() called
D/ActivityA: onStart() called
D/ActivityA: onResume() called
D/ActivityA: onPause() called
D/ActivityA: onStop() called

Can clearly see that ActivityA is recreated, moreover somehow ActivityA#onResume is called after ActiviyB#onResume??

Okay, so now we have ActivityB on top of the stack, then I press back button:

D/ActivityB: onPause() called
D/ActivityA: onStart() called
D/ActivityA: onResume() called
D/ActivityA: onPause() called
D/ActivityA: onStop() called
D/ActivityA: onDestroy() called
D/ActivityA: onCreate() called
D/ActivityA: onStart() called
D/ActivityA: onResume() called
D/ActivityB: onStop() called
D/ActivityB: onDestroy() called

ActivityA is recreated again?

As I see in my device, there's an animation that ActivityA rotates into landscape mode before ActivityB becomes visible, and when ActivityB exits, ActivityA again rotates back to portrait mode. This behavior may cause ActivityA recreate again and again.

It messes up a lot, do you know how to prevent ActivityA recreate on this case, or this is a bug of Android itself?

from Android 10 - Weird activity lifecycle