I’m sure it uses an acceleratometer chip like your phone has.
One thing to watch out for is other electromagnetic noise.
I put my form 2 in a metal cabinet and rigged an axial flow fan on top of a large charcoal filter inside the cabinet to clear the fumes from entering the office.
But my printer would not show level- the little indicator would wobble and keep telling me to level the perfectly level printer.
When I moved the fan Outside of the cabinet, the problem disappeared. The motor in the fan somehow interfered with the accelerometer.
so first thing is I would see if anything electronic or motorized nearby might be causing an issue.
Secondly- have you rebooted the printer? The level sensor is part of the logic board and like any smartphone it can be subject to corrupted code…