I also played Nd8 in my case, but i was playing with 1 second like a few moves. Worse in your case you can never be mated at all. In my case although it cant happen, theorethically if my king goes to h8 and his king is on f8 my pawn remains on h7 and bishop checks on long diagonal safely even if my knight can block the check i can be mated.
Yes, if jonesmh promotes his pawn to bishop or knight then he can be mated in one of the black corners. A loss on time is a loss except when the opponent cannot mate by any series of legal moves. That is the FIDE Laws of Chess. To avoid this kind of situation, play with increment.