Team calendar for ESS users is showing up empty. this is happening for a specific group of users in the same team. This team's MSS users are however able to see Team calendar OK.
Checked in PTARQ for a specific user whose team calendar is showing up, who was unable to view team calendar in GHR portal.
Rule Groups are used by other groups and they can see ESS team calendar fine, so I dont think there is any problem there.