0. ALWAYS PROVIDE INFORMATION ABOUT MODLOADER (Fabric / Forge) AND MOD VERSION (For Example 1.19.2-8.2.10)
   Fabric 1.21-10.0.6

1. Describe the bug
   Everytime I try to do the backpack tank nothing comes out of it

2. Write steps to reproduce the bug
   1- Go to crafting table
   2- See backpack tank recipe: a iron ingot at the top and a iron ingot at the bottom
   3- Do the recipe
   4- Nothing comes out

3. What is expected behaviour
   HAVE THE BACKPACK TANK TO DO THE BACKPACK

4. Screenshots (If applicable)
   
   

You need glass on the sides

I had to get one from creative mode but you should fix it

You sure?

Fabric 1.21

Works for me in-game

Do you play server, modpack?