FullScreen OpenGL rendering on the Server does not update on the Viewer

I am currently having issue with FullScreen OpenGL rendering with VNC.
If I enter the FullScreen mode rendering with OpenGL, then VNC Viewer
cannot be triggered to update. Only a black screen is shown.
Only when GDI windows are on top of it, VNC Viewer starts capturing the
changes on the Server.
I know it's because OpenGL rendering bypass the GDI (maybe that's monitored
by the mirror driver?), thus not be able to trigger the updates in the VNC
Viewer.

I tried to disable the mirror driver in "TightVNC Service Configuration ->
Server -> Update Handling", it does not help.
I also reduce the Screen polling cycle to 50 ms. It does not help.

Is there any suggestion about this issue?
Thank you!
Lin

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