Very possible this is a hardware problem. I have reinstalled the original android OS to the JingPad to see. If I have more issues I will start another thread.
Jingpad is basically an expensive paper weight, worst decision I ever made.
This is definitely not the case. My JingPad works wonderfully.
You are running xenial, correct? Did you 'downgrade' from focal? That has been known to cause the issues you are having.