specifically, it breaks the Vanilla Tweaks Wandering Trades Datapack, (https://vanillatweaks.net/picker/datapacks/ - under hermitcraft)

I don't know how, or why, but something about having that setting on makes the wandering trader always have the exact same custom trades instead of a randomized set each time it is spawned.

not a huge deal, but kind of a weird thing to break that on the surface does not seem even remotely related.