[1.11] NBT Data Problem

[Pingubro]

Hello,

 

I have a question regarding NBT of ItemStacks. In my code

in this line the NBT is always null even if I have captured a mob.

I know I am not checking, but when I check it is null

 

Maybe, somebody had the same issue as me and can help me out.

 

And also are there things I should always do when writng NBT to things?

 

Thanks, Pingubro

[Pingubro]

Thanks solved now