Hi there, I am using esp8266 lolin with micropython. I have done some kind of stress tests, disconnecting the power, resetting the board with reset button in order to test how it will behave.

What have I found is that files are missing from the board. I am using ampy to check the files on board. I have executed the commnad sudo ampy --port /dev/tty.wchusbserial1420 -d1 ls and I have gotten the output like this:
/. /. /. /. /. /. /. /. /. /.

I am not sure why is this happening, I was able to upload files, get existing files without any problem until I once pressed reset button to see will the board continue with work as expected.

Can somebody tell me is this related to micropython or the chip quality?

Thanks :)