Mixedrealitytoolkit-unity: Follow me is not working on Arm64, Unity 2019.3.10f1

[kianng]

Describe the bug

In any pinned Slate window, when you select Follow me, the entire slate window will disappear from view.

To reproduce

Steps to reproduce the behavior:

1. Go to 'Hand Interaction Example scene'
2. Click on 'Follow me button on Pan and Zoom Interaction window' or unPin the 'Toggle features' menu
3. Both windows will disappear. There are no ways to get it back either that I am aware off. Follow me on Edge browser works perfectly, either in Shell or in the Hand Interaction scene.

Expected behavior

Follow me button should unpin the slate window, and started following me.

Screenshots

If applicable, add screenshots to help explain your problem.

Your setup (please complete the following information)

• Unity Version [2019.3.10f1]
• MRTK Version [v2.0]

Target platform (please complete the following information)

• HoloLens 2

Additional context

Add any other context about the problem here.

[keveleigh]

Related to #7624

[wiwei]

Closing this out as a duplicate of https://github.com/microsoft/MixedRealityToolkit-Unity/issues/7624#issuecomment-665309866