Bundle tooltip doesn't update properly in the anvil's output slot

Steps to Reproduce:

1. Enable the Bundle experiment in the world settings

2. Put a bundle inside of an anvil

3. Hover over the output slot

4. Change the item name and observe
   ❌ The bundle icon appears but no tooltip is displayed

5. Move the mouse elsewhere and hover the same slot again
   :info: The tooltip is updated

6. Go back to the original name by typing it again or deleting all the text
   ❌ The tooltip completely bugs out

Observed Results:
The tooltip doesn't appear or disappear while the mouse is hovering over the anvil's output slot.

Expected Results:
The tooltip appears and disappears alongside the item icon.

Screenshots/Videos attached: Yes

Notes: Renamed bundles also lack the italic formatting (MCPE-185502)