Delayed MMS messages on S7 Edge after OTA update

I did the AT&T over-the-air update for my S7 Edge and since then, it seems like picture and audio messages are delayed in their delivery. The recepient is an iPhone user, and while I know that iPhone to Android MMS and group messages (and vice versa) have issues right now, I wasn't having any issues until this update. Anyone else experiencing the same or similar issues?