Entity shadows disappear for a split second when dropping items in first-person mode

Summary:
When an item is dropped in first-person mode, entity shadows disappear for a split second.

Steps to Reproduce:

1. Spawn an entity
2. In first-person mode, drop items on the ground while looking at the entity's shadow

Observed Results:
Entity shadows disappear for a split second when dropping items.

Expected Results:
Entity shadows should not disappear when dropping items.

Video:
Minecraft 2021-10-15 11-27-26.mp4