If I unplug my core2 from USB and let the battery go, when I turn it back on my video and sound no longer works, but my firmware is still running. I can tell because it's dumping to the serial port.
I can "fix" it by using M5 Burner, burning the factory firmware, and then reburning my hardware. This isn't usable like this.
Is my unit defective? What gives?
Here's a reproduction. It must be compiled under Platform IO.
https://github.com/codewitch-honey-crisis/empty_m5stack_core2

I bought an M5Stack Fire yesterday and uploaded some custom firmware. It worked fine at the time. I stuck the thing on my refrigerator.
Today I took it off my refrigerator and over to my bench to play.
Now, when I turn it on, it starts up and runs, but then turns itself off after about 3-5 seconds (i didn't time it)
This makes it impossible to upload or use.
Before I issue a return through the reseller I was hoping someone here knew how to solve this.