I don't think it's that, because it happens in both situations. It doesn't matter if it's connected to USB adapter or PC with Espruino IDE running.
When I have the wifi error, the board works without any issues, I just can't get the wifi to work.
When everything is working normal again, I see the red power up flash and instantly the blue flashing from the ESP connection.
The main power sources I'm using are the USB hub connected to my macbook, a standard USB hub adapter with a power source and an old USB charger.
It looks like the error is not happening when I'm sure the wifi connection is closed each time I disconnect the USB . But that could be a coincidence as I have no idea what's going on :)
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