main (blocked): tid=1 systid=19936 | waiting to lock <0x04f64287> (zn7) held by thread 70
       at com.google.android.gms.internal.ads.zzelo.zzz(com.google.android.gms:play-services-ads@@21.1.0)
       at com.google.android.gms.ads.internal.client.zzdu.zzn(com.google.android.gms:play-services-ads-lite@@21.1.0:1)
       at com.google.android.gms.ads.BaseAdView.pause(com.google.android.gms:play-services-ads-lite@@21.1.0:1)
       at *.*.*.MainActivity.onPause(MainActivity.java:528)
       at android.app.Activity.performPause(Activity.java:8335)
       at android.app.Instrumentation.callActivityOnPause(Instrumentation.java:1511)
       at android.app.ActivityThread.performPauseActivityIfNeeded(ActivityThread.java:5103)
       at android.app.ActivityThread.performPauseActivity(ActivityThread.java:5064)
       at android.app.ActivityThread.handlePauseActivity(ActivityThread.java:5015)
       at android.app.servertransaction.PauseActivityItem.execute(PauseActivityItem.java:46)
       at android.app.servertransaction.TransactionExecutor.executeLifecycleState(TransactionExecutor.java:187)
       at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:102)
       at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2315)
       at android.os.Handler.dispatchMessage(Handler.java:106)
       at android.os.Looper.loop(Looper.java:263)
       at android.app.ActivityThread.main(ActivityThread.java:8276)
       at java.lang.reflect.Method.invoke(Method.java)
       at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:612)
       at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1006)