Bundle's fullness bar in the hotbar doesn't update instantly

Steps to Reproduce:

1. Enable the Bundles experiment
2. Put any amount of items inside of a bundle;
3. Close your inventory
4. Use the bundle

Observed Results:
The fullness bar doesn't update until you open your inventory, collect an item or interact with the hotbar in any way.

Expected Results:
The fullness bar updates the moment you use the bundle.

Screenshots/Videos attached: Yes

Notes: