I'm getting the same issue, logging out and back into my DTG account doesn't work neither does restarting the game. Might have to do a support ticket about it
I find that every time I go on the Mastery screen it reloads and sometimes I get the correct progress but more often than not it shows incorrect (someone elses?) progress!
Except when it doesn't... The progress for some routes is stuck, and nothing happens regardless of what I do. Examples: 1. HDX: tier 2, "Every nook and cranny" is stuck for me at 5766/128000. I re-run scenarios, this won't budge. 2. Island Line: tier2, Islander is stuck at 1/3 and All Over the Island is stuck at 563/80000. I ran scenarios and timetables, they won't budge. 3. Glossop Line: tier 2, "All the stops" is stuck at 1/3, and Jack of All Trades is stuck at 0/3. I ran scenarios and timetables, they won't budge. I also have a couple of unusual ones: 1. Linke Rheinstrecke: says Tier 1 is completed, but shows Purist progress at 0/32000; says Tier 2 is in progress, but shows both challenges done, 1/1 (and the bar for Tier 2 is 100%). The Tier 2 reward is locked. 2. Glasgow Cathcart: shows Tier 2 in progress, with "Fast-Track Ticket" progress at 0/1. Shows the reward locked, but the UFO can be enabled in the rewards selection screen! Of course, I have also tried closing the app and re-opening, logging out and back into Dovetail Live, etc.
Same problem on WSR tier 2 „Take me home, country roads“: my progress is stuck at 9/100. Strange thing is that other achievements on WSR progressed just fine during the same playing session. Hopefully it will work someday…