Can't go to the next lesson group after finishing previous ones
It works well in case of complitting lesson-by-lesson, but does not allow to go to the next lesson goup after all-group test.
Hello! I'm not on the tech team, but the wiki just put up a new Troubleshooting page with a few ideas on it if you'd like to check it out. I think it mentions this scenario. I can't gaurantee it'll fix it, but it might be worth a try http://duolingo.wikia.com/wiki/Troubleshooting
I hope it helps! :)