- I interacted with the South telescope because it’s closer to the stairs
- Swapped to the North telescope, un-equipped the lens that was in the 2nd slot (click & drag back into the inventory)
- Shift+RMB the lens I wanted, lens simply disappeared:
- Was not slotted in the telescope
- Was not in other telescope
- Was not dropped on the ground.
Restarted the game, lens still missing.