Closely related to MC-207882: When you right-click the red cross in the survival inventory of the creative inventory while having an item in the player.cursor slot, it deletes the entire stack instead of just one item.

Steps to reproduce

1. Hold an item stack in your player.cursor slot
2. Hover over the red cross icon in the survival inventory section of the creative inventory
3. Right click

Observation: The entire stack was deleted.
Expectation: Only one item from the stack should be deleted.