There are 4 sensors on the pillar that detect the magnets, staggered left/right from top to bottom to pick up the 2 doors. Any one of them triggering will trigger the door sensor detection logic. They each have a small LED that in a darkened room you can see turn on when you bring a magnet near.
I’m guessing something isn’t placed correctly. Here’s the location: 3D and Laser modules no longer working - #9 by brent113
If one side of the enclosure is never triggering the door open detection that sounds like a flaw to me and you should consider reaching out to support.