WiFi AP "password incorrect" in one T3S3 board

[moshe-braner]

I cannot connect to the wifi network of one of my T3S3 boards (out of 3) when it is in SoftAP mode. The same .bin flashed into another board of same model works without problems. Also, the same board that does not connect in SoftAP mode connects with no problems if set instead to be a client on the house wifi network. How can this happen? Is the hardware in this specific board defective? In a way that is specific to the wifi encryption in SoftAP mode? Or is there a bug in a library, that is specific to this board? For example, perhaps the encryption algorithm uses the chip ID or MAC address in a way that can fail on some boards and not others?