А вот и решение проблемы!!!
Linda Liu [MSFT]
Hi Sean,
Thank you for your reply and the detail feedback on the problem. I had a
try using Web Browser Control and encountered the same problem as you
described.
But It is ok using AxWebBrowser. I have reported such problem
to MSDN Product Feedback Center. For more information, please refer to
http://support.microsoft.com.
Thanks.
Sincerely,
Linda Liu
Microsoft Online Community Support
Так что надо юзать AxWebBrowser, а не WebBrowser