ESP-12E hardware reliability

[somedude]

I have six ESP-12E modules and I noticed while trying the mesh software demo that 2 of them have the tendency to crash and reset.
One of the ones that crash was updated to AT 1.1 firmware, part of 1.5.4 SDK, and it seems to dropping the COM port after about a minute of use. A reset doesn't re-establish the communication and I have to power off the module.
Conversely, the ones that work are 100% reliable.

I have read on the web that the flash chips may come from different vendors and can have reliability issues, but in my case, I can always flash the module, but it seems to crash quite frequently. I tried the debugger plugin for the Arduino IDE but it's not clear as to where the issue is.

Any ideas and possible solutions to this problem?
Thank you very much.

[cszhaoqm]

My ESP-12E has same problem, I just let it upload a data to Yeelink every 10 seconds, several times of reset per week.

[ESP_Greg]

Hi guys, can you provide more information that I can look into?