Hi @mdma, I am actually experiencing the issue that was initially mentioned here. I just had it happen for the second time (two different Photons) where it had previously been working fine but then on a power up it unexpectedly entered listening mode instead of running my firmware, and I had to reconfigure the Wi-Fi credentials before it would connect again (restarting the device would just cause it to enter listening mode again).
Interestingly, after re-configuring the Wi-Fi and running my firmware, I hit a switch to connect it to the Cloud (I have it running in SEMI_AUTOMATIC mode), but the device keys were then bad! The device keys were previously fine… it was either coincidence or both issues occurred at the same time. I will email you a memory dump file from right after the listening mode issue occurred. Unfortunately I don’t have a memory dump file from before the issue occurred, but I can also make one for once it is running normally again if that helps?