Hey, I have an item which has 2 timers stored in NBT, a cooldown and a time remaining counter. For some reason, if the NBT is being modified, the item does some crazy jumping thing if you hold it in your hand (Like when you right click an item on the ground, except constant). I don't remember this being an issue in 1.7.

 

Here is my code: http://pastebin.com/C9ZrfKVY

 

Any help would be much appreciated!

Do you need to handle the cooldown in that manner? One alternative would be to store its last use time (

World#getTotalWorldTime

) in the NBT and just compare that to the current time when the player tries to use it. I do something like this here.

 

If you have to handle the cooldown like this, override

Item#shouldCauseReequipAnimation

to ignore the NBT of the stacks.