Only experienced it just now in MP.
Missed the basket of the KC-135MPRS and Jester started repeating all of his quips about missing, didn't give any other callouts. Turned Jester inactive in the menu, then back on, and he carried on repeating. Turned him to silent, and back on, and he carried on repeating. Only after breaking from the tanker, probe back in, and turning him inactive did that reset him back to normal and we carried on.