Washer malfunction/reset?
I think it's a little premature to try and diagnose a problem that at the time doesn't exist. There are a few micro switches, like the one in the washer door, that if not completely closed can stop the machine. Maybe a problem with the gear cam that will stop the machine at the same place each time. Is the Reset button a system reset or a load size reset? If a system reset, you might have corrected the problem like a reboot on a computer... 
Monitor the operation of the machine and try to get some more information. Good luck.