What is the current behavior?

Different timing conditions during shared element transitions can cause the following error:

java.lang.IllegalArgumentException: A shared element with the target name 'image-1234567890' has already been added to the transaction.
androidFragmentTransactionCallback file: @nativescript/core/ui/transition/page-transition.android.js:245:0

What is the new behavior?

Prevention to a target already being added to the transaction.

Originally posted by @abo-L in NativeScript/NativeScript#10793 (comment)