Not just me then. I always have trouble after ctrl-c....could be my setup but for example I had an SMP due to finish around 4am (local= 2 hours to end of race) on the last day of the race so I shut down the other one once it completed using ctrl-c and doing so stopped the first one too. so on restart the one I closed on purpose started fine the one I was trying to give more cycles to failed to find the checkpoint and started anew

The safest way for me so far is restart windows. ....go figure