How to reproduce:

1. Open attached project "874301-repro.zip"
2. Open "Test" scene
3. Add additional scene "Test2"
4. Enter play mode
5. Select game object "Cube" in "Test2"
6. Lock Inspector
7. Exit play mode

Expected behavior: Game object "Cube" stays in the same place and no errors occur in the Console
Actual behavior: Game object "Cube" has disappeared from Hierarchy. "Failed to unpersist" errors in the Console

Reproducible: 5.5.1p1, 5.6.0b5
Not reproducible: 5.3.7p3, 5.4.4p2