Broken Custom Maps in RL
Custom maps now are unplayable in multiplayer, and take like 5x more time to load for single player!
Many custom map makers (Simple Shark, Ecrase Patate, Leth, etc.) have tweeted out many times about this issue, and the devs really haven't responded yet.
But, it just happened like a couple days ago, so we don't know what's going to happen yet. But, until some update happens, multiplayer custom maps are off the table. And if you want to load up a rings map? Two things will happen: Either it takes like 2 minutes to load, or your game will crash.
Check out Leth's video about it
TL;DR: Custom maps aren't really working sadge