I'll see what I can dig up on the hotspot. I want to say that it's not the hotspot because the other eggs work, and the problem egg doesn't work when it's the only egg on the hotspot. But I won't rule it out completely.
Level of comfort is pretty low, but I can figure it out if you can send me the commands I'll need, where the files are on GitHub, etc...
Just noticed RSSI reported at -46