Error when animation is running on ReadableBottomBar

[httyd98]

The error occurs when a view docked under the ReadableBar is set with visibility = view.VISIBLE at runtime from code, therefore the height of this view increases by raising the ReadableBar and then creating an animation event for the ReadableBar. This animation event crashes the app. I'm using the ReadableBar inside a constraint layout with android: animateLayoutChanges = "true"

java.lang.NullPointerException: Attempt to invoke virtual method 'void android.view.animation.Animation.setStartTime(long)' on a null object reference at android.view.View.startAnimation(View.java:23707) at com.iammert.library.readablebottombar.BottomBarItemView.select(BottomBarItemView.kt:65) at com.iammert.library.readablebottombar.ReadableBottomBar$drawBottomBarItems$1$listener$1.onGlobalLayout(ReadableBottomBar.kt:162) at android.view.ViewTreeObserver.dispatchOnGlobalLayout(ViewTreeObserver.java:945) at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:2542) at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1635) at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:7795) at android.view.Choreographer$CallbackRecord.run(Choreographer.java:1172) at android.view.Choreographer.doCallbacks(Choreographer.java:984) at android.view.Choreographer.doFrame(Choreographer.java:809) at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:1158) at android.os.Handler.handleCallback(Handler.java:873) at android.os.Handler.dispatchMessage(Handler.java:99) at android.os.Looper.loop(Looper.java:193) at android.app.ActivityThread.main(ActivityThread.java:6863) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:537) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858)