NetworkBehaviour generated PreStartClient does not call base.PreStartClient

I have a base class with a "[SyncVar] GameObject x;" and a subclass with a "[SyncVar] GameObject y;"
The client will fill in "y" but not "x".

This is caused by UNetWeaver not generating a call to "base.PreStartClient()" when it generates the subclass's "PreStartClient".

To reproduce:
1. Download project attached.
2. Build and Run a Player and select host or server mode.
3. Run in the editor and select client mode.

Actual result: You should see an error logged for SubclassCube but not BaseClassCube.
Expected result: PreStartClient shall be called on subclass also.

The broken code is in Unity.UNetWeaver.NetworkBehaviourProcessor.GeneratePreStartClient
specifically https://github.com/Unity-Technologies/UnityCsReference/blob/master/Extensions/Networking/Weaver/UNetBehaviourProcessor.cs#L812