Events+ and BuddyPress Groups - should private group events be displayed to all users?

Hi there,
Another query - sorry.

On the Events+ plugin, we have an option as follows for each event:
"This is a group event for"

If we select a private group the Event is still displayed for all users (including those not members of the group). Is this default behavior? Is there a way to hide these events for non group members?

Thanks in advance.