How to try:
- Create a course with user S1 enrolled as student. Create 2 groups (Group A and Group B) and add user S1 to both groups.
- Create a lesson into the course
- Add a group override for the Group A defining the open and close dates on the next few days.
- When user S1 login into the course and go to the calendar it should show lesson open and close events but it did not.