Solved
[ECO] Toilet keeps catching fire (Roommate autonomously upgrades)
Product: The Sims 4 Platform:PC Which language are you playing the game in? English How often does the bug occur? Often (50% - 99%) What is your current game version number? 1.73.57.1230 What...
Oh boy.
I can see three possible options.
1. You say you use mods. You can use MCCC to forbid upgrading the toilet.
2. Kick out the roommate. (Alas. You probably need the money.)
3. Buy an insect farm and regularly clean out the toilet to feed the compost to the insects.
(#3 is the EL intended solution.)
Good luck! I hope that helps!
