Likely caused by the most recent fix of MC-7222.

To reproduce:

1. Place a brewing stand
2. Place a stack of empty glass bottles somewhere in your hotbar
3. Right-click the brewing stand
4. Shift-click the stack of empty glass bottles
5. Observe the stack move into the main inventory. Expected: One glass bottle moves into the brewing stand, the rest of the stack remains where it is. See enchantment table for this (correct) behavior.