I was just working on a campaign to go out soon. I had it all ready to go. Then I clicked Test Template.
I received the test email as normal, but it didn't have most of the work I'd done on the template. About 45 minutes of work was lost for some reason. It not only didn't appear in the email I received, but it also disappeared from the template I was working on. So now I have to go back and redo all that work.
I presume I should have clicked Save Template Changes Only, and that would have prevented this from occurring. Regardless, it should save automatically or confirm that you want to save the template before sending it out.