the new Icebrood Saga masteries are missing in the API:
They are not listed in https://api.guildwars2.com/v2/masteries
API:2/account/masteries does not include any new mastery-ids
In achievements the mastery region is "Unknown":
Could someone please fix this and include / white-list this data in the API?
https://www.gw2gh.com/ - A GW2-Guild-Hall.
Register and check your guild leaderboard to see who is the best in your guild and who finished achievements first.