Just went to check on the challenge update and all my mastery achievements have reset. Now it shows no progress whatsoever on any of the routes. Anyone else having similar issues?
I have got the same problem, is suffers from memory loss. Not even an hour ago someone else reported it too: https://forums.dovetailgames.com/threads/mastery-challenges.35400/
I have the same problem. Beware! Incoming rant... Honestly, it's just a pain in the ass. I WANT to love the game and in a way I do. But not a single day goes by without something not working or going wrong. Missions are bugged, tutorials are bugged or incomplete.... every time you have to research on the internet just to find out... ahem... yes, it's a known bug. I started with the Mastery stuff a week ago and as you would expect there is nothing but trouble. It only works sometimes anyway, and now it doesn't work at all. Guys, honestly. TSW could be so great. I know DTG works a lot and is continuously improving. But make sure that this basic stuff at least works halfway. Rant over.
It appears that Dovetail Live has gone offline overnight. With any luck, once it comes back up you'll get your stuff back.