Try a simple test case and post it if you still have a problem.
I've done a simple case and I've found out that I get this problem when the htmlText is inside a TabNavigator object. If it's outside it works as expected.
This is what is going on...
I think it's a focus issue. You have to click once on the link for the tab to gain focus. Is there a good work around for this?
Okay, I had to set the tab navigator focus to false.
_tabNavigator.focusEnabled = false;