[Bug]: Items disappear from Netherite Shulker Box after restart.

[xtended2l]

Possible Fixes

Yes

Modpack Version

1.18

What happened?

I have Netherite Shulker Box in my inventory. If I drag and drop item to the shulker box by right click inside of inventory, even while I see them in preview:

these items will disappear after the game restart.
To prevent items from disappearing, I have to place the shulker box as block and open it to see contents. After that I can mine it back, and items will be preserved.

latest.log

No response

Developer reports

No response

[xtended2l]

Just want to add this is not new, happening for a while for me.