When I use thebetweenlands with quark and vanilla tweaks mods, there is a lag when a player kills a mob, this only affects the client side, when the mobs die alone it becomes normal.
I tried to see the log but it doesn't show anything about this problem, as if it hadn't happened. It doesn't crash or anything, just this lag happens, when I disable the betweenlands it works normally. So the mod is having an incompatibility with some feature of the mod quark.
mod version: The Betweenlands v3.7.1
Forge: 1.12.2 - 14.23.5.2854