Where does all those Accessing hidden method come from in Android 10

When I run my app in Android 10, I see a bunch of "Accessing hidden method" being logged. When I run the same app in Android 6, I dont see those! The app was running great for months. Note that I dont see any problems in the app... Just a bunch, and I mean, a bunch of Warnings that makes things difficult to debug!

Any idea where they come from ?

Here's a extract of logcat

06-09 14:47:26.500 W/.AppName_Droi( 5045): Accessing hidden method Lsun/misc/Unsafe;->putLong(Ljava/lang/Object;JJ)V (greylist, linking, allowed)
06-09 14:47:26.501 W/.AppName_Droi( 5045): Accessing hidden method Lsun/misc/Unsafe;->putObject(Ljava/lang/Object;JLjava/lang/Object;)V (greylist, linking, allowed)
06-09 14:47:29.855 W/.AppName_Droi( 5045): Accessing hidden method Lsun/misc/Unsafe;->getObject(Ljava/lang/Object;J)Ljava/lang/Object; (greylist, linking, allowed)
06-09 14:47:29.855 W/.AppName_Droi( 5045): Accessing hidden method Lsun/misc/Unsafe;->putObject(Ljava/lang/Object;JLjava/lang/Object;)V (greylist, linking, allowed)
06-09 14:47:29.860 W/.AppName_Droi( 5045): Accessing hidden method Lsun/misc/Unsafe;->getLong(Ljava/lang/Object;J)J (greylist,core-platform-api, linking, allowed)
06-09 14:47:29.860 W/.AppName_Droi( 5045): Accessing hidden method Lsun/misc/Unsafe;->putLong(Ljava/lang/Object;JJ)V (greylist, linking, allowed)
06-09 14:47:29.860 W/.AppName_Droi( 5045): Accessing hidden method Lsun/misc/Unsafe;->putInt(Ljava/lang/Object;JI)V (greylist, linking, allowed)
06-09 14:47:29.860 W/.AppName_Droi( 5045): Accessing hidden method Lsun/misc/Unsafe;->putObject(Ljava/lang/Object;JLjava/lang/Object;)V (greylist, linking, allowed)