Group Calendar - Events not visible for all members

Group Calendar - Events not visible for all members

Hello,

We have a Group calendar for our organization, with many members in the group.  Recently, the behavior changed on group calendar events, where not all members can see all events.

Explanation:
  1. Let's say we have a Group Calendar with members Alice, Bob, Charlie, Dave, and Eddie.
  2. If Alice creates an event on the group calendar and does not specify any attendee invites, then the event will be visible to all five members of the group as normal.
  3. if Alice creates an event on the group calendar and does invite Bob, then only Alice & Bob will see the event.  Charlie, Dave, and Eddie cannot see it at all.

This behavior change seemed to occur recently on its own; to my knowledge, no settings were changed, and I cannot find any preferences to control this behavior.

How can I set all events on a group calendar to be visible to all members, even if they are not invitees?

Thank you!