For some reason the ARcore part of the engine once activated, changes something internally in a way that even in between levels it affects other tracking plugins like AR4Unreal (ARToolkit). In this video i can show you what’s happening:
For everyone else that is thinking of buy a commercial version of the AR4Unreal, please checkout this build, its for Android, here you can experience the problem between the 2 plugins.
I can provide in a private message the basic project shown in the video for someone related to the Epic Games Staff.