The answer to your question is yes...most likely it will happen again. I had the same thing happen a few times in our Essex.
My understanding of the problem is this: The brain for the keyless entry has four available slots for input devices. The coach comes with two fobs. The two fobs are programed into the controller. If the other two slots are left unprogramed, the gremlin will appear from time to time.
The fix (as I understand it) is: Program all four slots with the two fobs...Each fob gets programmed into two slots. That's what Newmar did to fix our gremlins.
SX_RVing - 2006 Newmar Essex 4502