I'm trying to update some markers in order to improve tracking stability / recognition on an existing project. For some reason If I add / replace markers unity UI becomes quite slow. After deleting library folders project kind of works again, and I say kind of because in editor markers work reasonable well, however when I deploy to device (android) new markers are not tracked at all. I know markers are working because if I start from a brand new project, the markers do track well.
How can I fix this? I really don't want to re-do whole project.
Using vuforia 9.6.3 and unity 2019.4.16.f1