Not sure if the other version works but heres the bug: U know stacks right?

Well i made a stack of golden axes (one stack) and put it in a shulker box with other items.

And when i break it this happens: I check the shulker and it says only gold axes. I place and check it and its only golden axes. Basically other items were overwritten.

I dont know how but its pretty confusing. Even if u can only get it with cheats. It works in servers

and singleplayer.

In the comments are commands used to stack items.