Why am I getting invites to events on my wife's shared calendar that I'm not an invitee on?

My wife and I each share a couple of our calendars with each other all contained in the iOS/iCloud ecosystem. Recently, I started getting calendar event invitations in my calendar app on my mac for events she creates or edits that don't involve me in any way, i.e. I'm not an invitee on the calendar event, e.g. she has a horseback riding lesson event that she schedules occasionally. 1. Why am I getting event invitations for these events? 2. Why am I not getting invitations for other events she creates on the same calendar? 3. Why is it when I decline the invite, it does not show up in the replied events alongside other declined events? 4. How the heck do I stop these superfluous invites from happening in the first place? I could switch the calendar to a subscribed calendar to stop receiving these invites, but I do occasionally make updates to her calendar if she asks, so that's not ideal. I have "Ignore alerts" checked on that calendar. This seems like a bug. Has anyone run into this before and solved it?