Strange esc behaviour?

unfortunately i just went for a fly then and one of my 20A afro (simonk firmware) ESC's stopped working for some reason?
i flew the copter los to the park while i was behind it, got to a nice spot to setup fpv,
plugged a new battery in, armed the copter and only 3 motors worked!
the one not working now just flashes red over and over, dont know what that means!
so bummed out all this week there is no wind! 

after i got back home from the walk of shame i plugged the battery in again to see if it would work and they all worked again?

i am so confused, i dont mind buying a new one to fix it etc but does anyone have an explanation for this? hahaha

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Shivchand Jaysaval liked Shivchand Jaysaval's profile
Aug 25