One Image Tracker is triggering multiple objects from other Image Trackers

Has anyone else ever seen this? I have 9 image trackers in my Mars scene. 2 of them work great and trigger the nested objects. The other 7 image trackers trigger multiple nested objects from all of the other 7 objects. The result is a jumble of nested objects. Has anyone ever seen anything like this?

** Using QR codes. I’m going to try more distant images to see if that helps.

Using Unity 2021.3.11f1. Arkit and ArFoundation 4.26. Also, things work fine in the Simulation view but the bug appears when exported to the iPhone.