I can no longer get the speed effect from using the Witch's ability while sprinting. It will go on cool down but no speed boost is added. So far every other potion effect works fine just not the speed boost. I created a new instance with just origins and mob origins to make sure it wasn't another mod causing the issue but still had the problem.

Also just a suggestion for the witch origin, don't know if it would be possible but it would be nice if they drank potions a bit faster as well.