Comment 13 for bug 1437486

Thanks for the info.
When you say it remains in sms conversations, do you mean the messaging application, or the menu that is displayed when you pull down from the message indicator to write the reply?

If you meant the messaging menu accessible from the indicators, try tapping the input field of the same message (as if you were trying to reply the same message again) and check if the text you composed before reappears.