https://pastebin.com/Jg8i49X2
Here is the log.
As I said, sheeps won't drop wool upon death with Quark enabled. Other mods are just vanilla+ kind of mod and does not have too much impact on the game. The only mod that isn't vanilla friendly is Touhou Little Maid.

It's not a bug, its a config option that you can change. Quark Configuration > Experimental > Game Nerfs > Sub Categories > Disable Wool Drops