Rebound "pick block" doesn't work in Creative inventory

The bug

If "Pick block" is set to a key, it doesn't work in the Creative inventory.

To reproduce

1. Rebind "pick block" to a key, for example Right Alt or V.
2. Put an item into the hotbar.
3. Open the search tab on the Creative inventory
4. Hover over the item in the hotbar and press the pick block key.
   → In case of "V", that letter gets entered into the search bar (might be intended), in case of right Alt, nothing happens (probably not intended).