Okay our team just went through this problem and I personally went and debugged, undeployed, updated, ect... continuously.
We were successful in fixing this, while one team member was fixing the chain, I jokingly just said "For fun let's just check the wiring just in case." We found at least four loose wires, we tightened them all down, turned on the bot, downloaded and then it worked. I might mention we did the download tethered, but it works now wirelessly too. Hope this is some help.
