Did some googling on this one, saw that people way back in 1.14.1 had the same issue. Game crashes when a player enters certain chunks, so far just 48 18. Running a multiplayer server with just the 4 of us right now.

One crash report is from vanilla, one from Forge and one from Fabric. I tried numerous types to see if it would help the crash but had no luck. Long story short, the crash occurs in unmodified minecraft and modified minecraft.