Mail2 Issues After 5/7/17 Upgrade

Hi all, are there any Mail2 clients out there? We're having problems with the most recent upgrade that happened on Sunday and I'm wondering if this is an issue for anyone else. We have some responsive templates that are about 3 months old. They were working perfectly but as of Monday morning any time we try to build a new email with these templates if you save a draft and then go back to it, the whole thing gets totally jumbled and lines of copy disappear.

Anyone else having issues? Mail2 is saying this is isolated just to us, but I find that very hard to believe.