On production, there are only two classes in the "student groups pilot" cohort. 4 other classes — two at any given time — were previously part of that cohort in the last couple of days. All six courses are showing up on the dashboard right now: http://dashboard.wikiedu.org/courses?cohort=Student_Groups_Pilot
The same thing has not been happening on the community dashboard instance, educationdashboard.wmflabs.org, which has far fewer courses. I removed a course from one cohort and added it to another without issue. I didn't test simply removing a course, but that is something that previously worked on production.
I suspect that this an issue related to the update process, which takes much longer and breaks more often on production.
On production, there are only two classes in the "student groups pilot" cohort. 4 other classes — two at any given time — were previously part of that cohort in the last couple of days. All six courses are showing up on the dashboard right now: http://dashboard.wikiedu.org/courses?cohort=Student_Groups_Pilot
The same thing has not been happening on the community dashboard instance, educationdashboard.wmflabs.org, which has far fewer courses. I removed a course from one cohort and added it to another without issue. I didn't test simply removing a course, but that is something that previously worked on production.
I suspect that this an issue related to the update process, which takes much longer and breaks more often on production.