protocollib #615 , pufferfish #61

https://pastebin.com/qD7v76Jv

player sometimes disconnects when mining shulker chest.
After a while, we found this is caused probably by custom fish item. ( not 100% sure )
this is nbt data of a fish item ,
https://imgur.com/a/KljYhhA

unsure if this could be handled in protocollib.

We have the same issues but no custom fish items on our server and use paper instead of pufferfish