When I select a text message notification from the banner, it opens in quick compose just fine. If I type a message and send it from there, the message sends fine as well. But if I type a message draft and navigate away from the quick compose window before sending, when I open the app, the text is all gone and disappeared and I have to retype everything. This is a new bug with the 3.12 update. Occurring on Android Samsung Galaxy s5.

Tl;Dr: quick compose doesn't save text to main app since 3.12 update.

In general, seriously, it was a great app! I appreciate the new features, but most are unnecessary and could use more testing (ugly new icon and the usability of the date search is not great) The app has been getting buggier over time. Maybe wait a bit longer to push these updates through and remember that you can't please everybody by just adding on a million different things...