GE Cafe Dishwasher

**Brand:**CDT805P2N3S1
**Model Number:**TS859987B
Main Symptom:does not clean
What happens & when: when it runs the the cap of the water distribution unit that houses a white magnetic spinner pops off seems like pressure is causing it to pop off I’ve cleaned everything many times- jets, all water delivery pipes and even blown back the drain it washes once well and then pops off again

Error Code (if any):
Parts or tests already tried:
Photos / video link:

You will need to check the spray arm hub as it would be the most likely cause for the spray arm popping off.