How to reproduce:
1. Open the attached project's "case_1308901-Project.zip" Scene labeled "TestScene"
2. Open the DOTS Entities Inspector (Window->DOTS->Entities)
3. Locate a child Entity with the "Bullet" Mesh (under PrefabAssetRegistry Scene)
4. Inspect the child Entity's tags (note there's a Prefab tag)
5. Enter the Play Mode
6. Locate the "_predicted" Entity
7. Select its child Entity
8. Inspect the Entity's tags

Expected result: The Prefab tag is kept
Actual result: The Prefab tag is not kept on child Entities

Reproducible with: 0.6.0-preview.7 (2020.2.4f1, 2021.1.0b7, 2021.2.0a4)
Couldn't test with: 2018.4.31f1 (Unity NetCode package is not available), 2019.4.20f1 (Project Scripts break when downgrading)