minecraft:inventory_changed advancement trigger always looks for items in one stack, even if it is not stackable

The bug

I wanted to make an advancement where you need to obtain 10 mushroom stews using the attached advancement, but when I obtained 10 mushroom stews, the advancement did not show up.

How to reproduce

1. Add the attached advancement to your world using a data pack.
2. Take 10 mushroom stews from the creative inventory.
3. See that no message appeared in the chat and no toast appeared.

Video showcasing the issue (although not with the same advancement): https://www.youtube.com/watch?v=xQnL59yeBY0