Steps to reproduce:

1. Clone and open Adventure - Sample Game project (link in the comments)
2. Open Persistent scene
3. Enter Play mode
4. Click on the doorway to the left to exit the room, and load in the new area
5. Observe several asserts in the console

Notes:

- Affects all lightmapping backends
- Has already been fixed by this PR on trunk: https://ono.unity3d.com/unity/unity/pull-request/140095/_/light-transport/light-714