There is a weird interaction between Glass Bottles and Tanks when transferring fluids.

How to replicate:

• Use any sort of filled Bottle containing a fluid (I am currently using the Rustic ones, various brews and Olive Oil) and right-click a Tank a bunch of times in a row.
• Watch your inventory.

Watch your inventory.

Works as expected: drains Bottle in survival mode, does not drain bottle in Creative mode.

Closing due to lack of response.