Still have not had a report of a level reset after the patch. Not calling it 100% fixed yet, but it's looking good so far.
To clarify for everyone why we've been cautious in declaring this issue officially fixed- there were two separate issues going here. One is the loss of progress being saved. Two is the ranks being reset.
We definitely fixed the first one, but did not intentionally fix the second issue. However, we have strong suspicions that the issues are related and thus have been waiting to see if the first fix fixed the second issue. In working terms, we call this 'a bug of a bug' which are always some of the most difficult to solve because you can't get to Point B without going through Point A.
Sometimes you can fix Point A and it will fix B, as we're hoping it did in this case. Sometimes, it doesn't fix B and you need to try something else.
Yes, I know this is very confusing, but this is the easiest explanation I could come up with without going into technical terms that are way more confusing. Hey, at least I tried!
-EvangM