Just to chime in - Also broken for me - Same stage too.
This is the second time out of the last 4 that I've had a stage in a survival challenge glitch out / not trigger. Unstoppable monster was the other one.
3/4 completion with everything checked off.
FWIW Notes:
I have the Energy Weapon kill checked off but doesn't count towards the completion.
- I did not touch Nuclear winter (haven't in 3~ weeks)
- It automatically triggered upon logging into Adventure mode
- I tried restarting 5x times and joining at least 5x different survival servers
- On each tried killing enemies with:
- Gatling Laser
- Laser Rifle
- Plasma Grenade
- It never triggered.
- I'm guessing it's perma-boned for my account until next week which is pretty disappointing especially given I had a server-crash evaporate my previous night light. (crashed during transfer to other player to hold for me while I sorted my inventory out)
CC /u/ladydevann & /u/valseeks fwiw. An advanced thank-you-for-your-time should you read this / look into it.