I have had similar "happenings" a few times and it was always caused by pushing some wrong button or combination of buttons by accident. Damn I hate it when it happens....it sends me into "Panic Mode". Old guys don't do good in panic mode...your blood pressure rises, you break out in a cold sweat, your face gets real red, and then that foul language starts to flow...which brings out Mrs Rupert and things go from bad to worse.
Squirrels gather outside my windows and laugh while placing bets on when I will kill over dead......it is just a plain ugly experience all around.
Fortunately, I have learned to be more careful when handling my K1......I don't want to be holding it in my angry trembling hands when I kill over.....that kind of damage is not covered by warranty.
Regards & Glad you are up and running again!