Weekly Maintenance has concluded and we have applied a patch. See below for patch notes:
-Fixed issue with Mysterious Antiquities and Challenge Grizzly Garrison instances via Instance Stone now reset after every day
-Raid Token cost requirement for True Weapon fragments have been reduced to 15
-Mission EXP Bonus cards not working in hot springs have now been fixed
-Amount of The Old Bark and Fiery-Eyed Jimmy's hair in their respective challenges have been increased
Maintenance has concluded + patch notes for July 30th
Source: Steam Community (opens in a new tab)