Remote Application Loses Focus after Enter Key pressed

I'm testing out Remote Apps for our network and I keep losing focus of the "window" after I hit the enter key.  This is happening intermittently on a XP SP3 and Windows 8 PC.  It seems to happen most when hitting Enter for a input box which brings up another input box.  However it's also happening every so often when it's noting bringing up another input box but going back to the form.  This would basically make Remote Applications unusable if they are going to constantly lose focus as the users aren't going to put up with this functionality.  The server that is serving the Remote Apps is 2008 R2.