This appears to be back.
I’ve been doing challenge dungeons this morning, and receiving no Activity Points.
–==[ EDIT ]==–
From the Patch Notes
- The Weekly Cap for Activity Points has been removed. The rate at which your Activity Points will be converted is based on your character’s Seeker Rating in relation to your Server’s Seeker Rating.
This is not working correctly.
Once the hero has capped their Battle Pass points, they will no longer earn any activity points.