Creating runtime worlds freezes server when specific datapacks are present

[showercurtain]

Title says all.

To reproduce: install Multiworld mod and VanillaTweaks Wandering Trades datapack and create a world with /mv create

I'm reporting this here instead of the Multiworld repo because I had this happen in my own project that uses fantasy

[OffsetMonkey538]

Any updates on this? I'm having the same problem