Issue 1 - already figure it out
You got a bug in displaying courses, when in lms/settings Default order in course directory is marked as BY RATING, than the courses which has no user ratings will not display in Course directory and will not display in My courses is Dashboard at all. In other ratings they are shown.
So we still in issue 2:
Addons Batches, Push Notification and Timings don't want to update and Batches, Push are not working