Object not found anymore after adding AT target


I created a first object, using an Instant Image Target.
Works fine, can see the interface.

Then, I added a new object, using an Area Target.
Object if found, but the previous object, using the Image Target, is not found anymore.

Deleted the first object, recreated it : now both the AT object and the new Image Target object are seen and detected.

Thats a funky bug. We need to look into this. Here is the corresponding issue ticked: