We sent a dynamic email yesterday (3/21/19) and everything looked good in a test, but when we actually sent the email, the copy was wrong. To try to figure out what the problem was, we looked at each dynamic section, and all were correct. I cloned the email, made it static, and searched the code for a keyword in the incorrect copy and was not able to find it. Some of us were having issues with Marketo timing out this week and we are thinking that that is what caused the issue.
Any feedback helps. We use dynamic emails all the time and have never run into this issue.