As the contents of your inventory change, the recipes hidden in the recipe book do not change.
This behavior varies from the standard recipe book, which updates its contents as items pop in and out of your inventory

The brewing stand recipe also doesn't include items stored inside the brewing stand itself, which varies from the behavior of the furnace recipe book.

Closing a brewing stand, then opening it again resets it to the default state of: recipe book open, not filtered by craftable.

Closing a brewing stand, then opening it again resets it to the default state of: recipe book open, not filtered by craftable.

This is because when you open the other books it sends a server packet or something and when putting it together i didnt want to deal with that.

Ill try and fix all these issues!

I cannot reproduce

This behavior varies from the standard recipe book, which updates its contents as items pop in and out of your inventory

Maybe the new changes fixed it. Dropping and item and picking it back up while in the inventory correctly updates the book