There is still a bug in the latest release - we apologize but are at the mercy of the app developer. As noted, most issues can be worked around by powering down the app (and the device) and then restarting the app in portrait mode. For the issue with the reply button not being active after entering text, you can add a carriage return at the end of your text and the reply button will become active. It's a workaround - not perfect but some help....
Thanks for your patience on this