Here is a recall
https://repair.maytag.co...sher.jsp?siteCd=MT_EN_US

It is for a leaking rinse aid reservoir. The rinse aid leaks down onto the wires and causes problems.

Third time in five years, the control panel has gone out.
When you say gone out do you mean that it is totally dead?
As other problems can exhibit this symptom re: door switches.

Any problems on grounding, etc.
As far as I know no. Perhaps someone else has heard of a problem.
I would check that the hook up is properly grounded?
Also is the unit on a separate line? If it is on a line with an appliance that draws a fair amount of current you may be getting voltage spikes from the other unit.