Not that I can see, it don't. Do you have more information on how this appears to you?When a WebBrowser controls loads and navigates to a page it strips out everything after the '?'
Dim vURLString As String = "https://mysite.com/Manager_Utilities/Webpage.aspx?PageID=" & Page_ID & "&UserID=" & vUserID & "&HOAID=" & HOAID & "IDString=" & TempKey
Dim vURL As New Uri(vURLString)
Dim vBrowser As New WebBrowser
With vBrowser
.Dock = DockStyle.Fill
.Navigate(vURL)
End With
vURLString = String.Format("https://mysite.com/Manager_Utilities/Webpage.aspx?PageID={0}&UserID={1}&HOAID={2}&IDString={3}", Page_ID, vUserID, HOAID, TempKey)