Reproduction steps:
1. Open the user's attached project "NGO-bug-reporting.zip"
2. Enter Play mode
3. Select "NetworkManager" under "Don't Destroy On Load" in the Hierarchy window
4. Click "Start Host" in the Inspector window
5. Delete "NetworkRigidbody" in the Hierarchy window
6. Delete "NetworkObject" in the Hierarchy window

Expected result: No errors in the Console window
Actual result: Error spam in the Console window:
MissingReferenceException: The object of type 'NetworkTransform' has been destroyed but you are still trying to access it.
Your script should either check if it is null or you should not destroy the object.

Reproducible with: 1.0.0-pre.4, 1.0.0-pre.5 (2020.3.30f1), 1.0.0-pre.6 (2020.3.30f1, 2021.2.15f1, 2022.1.0b11)
Could not test with: 2019.4.36f1 (Package is not available), 2022.2.0a7 (Missing "U Net Transport" Script)

Notes:
1. Not reproducible if the child only has a NetworkTransform component