(I'm the dev of bank storage)
Version Info

• Minecraft, 1.21.1 neoforge
• Rechiseled, 1.1.6a
• Fusion, 1.1.1a

Description of the Bug
When placing blocks from a bank, the bank get consumed instead of the item.
This is caused by BaseBlockItem#interactWithBlock re-creating the UseOnContext ignoring stack, and instead (wrongly?) assuming the player-held item is the one to decrement.

Solutions
I can think of 3 solutions:

1. From my side: Replace the hand with the block before placing it, and then restore the bank.
2. From your side: Taking the stack parameter into account when creating the UseOnContext.
3. Both 1 and 2.
   I think 2 is the best solution as I don't have to worry about all the mods with hand auto-refill features and similar, causing weird behaviour. It is also super simple to fix on your side.
   What do you think?

Linked issue

This should be fixed now in version 1.1.18a of my core library for Fabric 1.18 - 1.21.4 and NeoForge 1.20.3 - 1.21.4.
Sorry for the delay and thanks for reporting the issue and looking into it!