Hi, I recently bought an Insta360 Nano. It was working well until I downloaded the new firmware update from the Insta360 website on the SF card. When I reinserted the SF card into the Nano with the new firmware downloaded, the Nano seemed to heat up very quickly and then would not seem to go to a green light (even though it was charged). 

I have tried resetting the Nano a few times now, as per the instructions, but it will only go onto a blue light and not to green. When I insert the Nano into my iPhone, it shows that the Nano is disconnected, and therefore not connecting. Has anybody had similar issues? Any help?