SpatialCoordinateSystem is NULL with Master Build

Hi,

I ran into a very strange problem. We wrote some code to get the SpatialCoordinateSystem from the WorldManager, something like:

Code (CSharp):

1.  
2. Debug.Log("WorldManager state (should be Active): " + WorldManager.state);
3. SpatialCoordinateSystem spc = Marshal.GetObjectForIUnknown(WorldManager.GetNativeISpatialCoordinateSystemPtr()) as SpatialCoordinateSystem;
4. Debug.Log("SpatialCoordinateSystem spc is null? " + ((spc == null) ? "true" : "false"));
5.  

When we build the application in Debug or Release mode, this works fine. However, as soon as we switch to Master (which we have to do for Store builds), the

spc

becomes NULL and the app crashes later on.

Code (Log):

1.  
2. WorldManager state (should be Active): Active
3. SpatialCoordinateSystem spc is null? true
4.  

I don't understand why this happens and how to fix this. Any help is highly appreciated.
Thx...

Unity 2017.4.29LTS
Visual Studio 2017 Community (latest)
Windows 1809 (building for 17734)
Hololens Standard Edition (running latest)

 

Same happens with this config

Unity 2018.4.2LTS
Windows 1903
Hololens Standard Edition (2019-6B update)

 

Ok, this seems to be directly related to:

https://issuetracker.unity3d.com/is...em-marshal-dot-getobjectforiunknown-exception

and the workaround proposed in the gitlab repo seems to work...