wingettext only works with the mouse moving over the window

[Scottofallthings]

$hWnd = WinWaitActive("[CLASS:WindowsForms10.Window.8.app.0.141b42a_r11_ad1]")
             MsgBox($MB_SYSTEMMODAL, "", $hWnd)
             $sText=WinGetText($hWnd,"")
             MsgBox($MB_SYSTEMMODAL, "", $sText)

I am trying to get the visible text from a window with the code above.  I am able to successfully get the handle, but the script appears to pause on the WinGetText command.  It will resume if I move the mouse over the window. 

Interestingly, the "AutoIt V3 Window Info tool" has a similar behavior.  If I put the crosshairs on that window, it will pause until I move the mouse over the window.  It will then populate all the info in the tool.  I also cannot inspect any of the controls in the window.  I think the window maybe some sort of "wrapper" for older code, but not sure.

Any help on keeping the script from pausing would be much appreciated.

[Bert]