It's all hidden achievements. You can get the nonhidden just fine (like getting to Reapers Coast) but you get one of 2 hidden achievements between defeating the act 1 final boss and arriving in Act 2 and neither will pop now. Worked fine before the series upgrade but doesn't work post update.
Also broke teleport and put a hard limit on stats that wasn't there prior. (If you'd used a ring to get strength required for items you can't use that to equip strength gear anymore)