The bug

In the player's inventory, navigating to the Search tab within the recipe book window shows the category an item belongs to in its description, in both Survival and Creative mode. However, upon closing the recipe book window while the Search tab is still selected, the item category is still shown on items, where it wasn't shown before.

Steps to reproduce:

• Open your inventory and open the recipe book window. Give yourself an item to observe.
• Open the Search tab, then check your item's description. Observe that the category on the item is shown, detailing which tab it belongs to.
• Close the recipe book window while the Search tab is still selected, and again check your item's description.

→ The category is still shown. It should not be present because the recipe book window is closed, and the category is therefore not relevant.