Map Device Eating Maps Visually on Precursor Towers

Hi, I didn't take screenshots but I noticed this odd behaviour.

Insert map into Precursor tower that I just reached. shows 2/3 unlocked

Ctrl + Click another map from inventory into this 1 slot device 2/3 unlocked (should be 3/3, also should not accept this map in the first place)

New map is now invisible, cannot 'traverse' shows 2/3 unlocked

Remove first map, shows 0/3 unlocked but allows traversal.
Add another map, shows 2/3 unlocked and does not allow traversal.

Remove this map, traverse with 0/3 and no map selected. Map that loads is the 'invisible' map. Completion awards all 3 unlocked precursor slots.

Seems like a visual bug only, I think I experienced this in a previous version and didnt report. This happened this evening on the latest patch.