Spatial Mesh do not show in hololens2 emulator.

i'm using Hololens 2 emulator version 10.0.19041.1157
MRTK version 2.6.1
Unity Version 2020.1.0a12.1360
Windows 10 64bit

In unity, i can see example mesh loaded from spatial mapping data ["MixedRealityToolkit" GameObject ->Spatial Awareness -> Spatial Objet mesh Observer -> Type ->SpatialObjectMeshObserver].
I have attached a script to Gameobject that draws lines on this sptial mapping as attached in screenshot below

 void Start()
 {
     IMixedRealitySpatialAwarenessSystem spatialAwarenessSystem;
     spatialAwarenessSystem = CoreServices.SpatialAwarenessSystem;
     spatialAwarenessSystem.ResumeObservers();
 }

while building the app to hololens in unity, i'm setting the value
["MixedRealityToolkit" GameObject ->Spatial Awareness -> Spatial Objet mesh Observer -> Type ->WindowsMixedRealitySpatialMeshObserver]

I have enabled "SpatialPerception" under Player Settings->Publishing Settings->Capablities.

There are no build errors, App Deployment from Visual Studio to Hololens emulator is successful [x64, Release]
Note: i have loaded default room in emulator.

upon app start, i don't see spatial mesh in emulator like i used to see in unity.
although i can see spatial mesh in webportal of emulator as shown in below screenshot.