I just registered, dl'd the groups calendar plugin and when I create an event, it doesn't update the group activity, ie: 'active 3 days, 23 hours ago' when I just created a event..
It does show 'admin created an event for the group Example group: 45 minutes ago' on the group's home page and on the activity tap..
Are you looking into this? As my home page shows the recently active groups and was kind of relying on this feature.
Regards and looking forward to your response for a solution.
Also going through the plugin, 'My Events' - 'You have no scheduled events' shouldn't be viewable to logged out users on the groups calendar page?