FlashForge Inventor II leveling sensor issue

[librariangirl]

I keep having the same issue with my FlashForge Inventor II, and am hoping someone on here has had the same problem and knows why it is happening. There is a small chip located on the front of the little sensor that drops down to make sure that the buildplate is level. The chip keeps popping off. It never happens when I am watching it. I work in a library, and apparently whenever our IT dept. has to replace the chip, it costs $200. My coworker and I are both getting frustrated, since neither of us can figure out why it would be happening. Has anyone else had this problem? I have attached a pic of the chip, as well as the sensor where the chip is missing.