crash and exit but cannot reproduce

[jyjsunny]

Reproduction Steps

Since I can't reproduce the bug on AVD, I don't know what triggered it. But crashes do happen, so i would like to know the reason.

screenshot

crash.and.exit.but.cannot.reproduce.mov

Stack Trace

: java.lang.IllegalStateException: The specified child already has a parent. You must call removeView() on the child's parent first.
: at android.view.ViewGroup.addViewInner(ViewGroup.java:4915)
: at android.view.ViewGroup.addView(ViewGroup.java:4746)
: at android.view.ViewGroup.addView(ViewGroup.java:4686)
: at android.view.ViewGroup.addView(ViewGroup.java:4659)
: at io.github.hidroh.materialistic.WebFragment.setFullscreen(WebFragment.java:509)
: at io.github.hidroh.materialistic.WebFragment$1.onReceive(WebFragment.java:94)
: at androidx.localbroadcastmanager.content.LocalBroadcastManager.executePendingBroadcasts(LocalBroadcastManager.java:313)
: at androidx.localbroadcastmanager.content.LocalBroadcastManager$1.handleMessage(LocalBroadcastManager.java:121)
: at android.os.Handler.dispatchMessage(Handler.java:105)
: at android.os.Looper.loop(Looper.java:164)
: at android.app.ActivityThread.main(ActivityThread.java:6541)
: at java.lang.reflect.Method.invoke(Native Method)
: at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:240)
: at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:767)