Emotes don't work when I click on them or assign them a key. I don't know what to do and I have emotes activated on Mods Options.

Does someone know a way to fix it?

Give a list of mods and a version.

Forge 1.11.2 - 13.20.0.2204
Optifine OptiFine 1.11.2 HD U B5
Quark-r1.2-73.jar

Does it happen without Optifine? (just Quark and Forge)

Yes, still not working without optifine.

Also when a witch kills a snow golem with my name it doesn't drop my head :/

Does someone know a way to fix it?

Shear the pumpkin from the golem head (IDK why, but it works) before the witch kills the snowman. The game may freeze for a while (it takes a while to get the player head), but then you'll get the head