emClient trying to update calendars that shouldn't be

Recently, I’ve started getting errors in emClient when someone responds to a calendar invite. If I am subscribed to someone’s calendar, and they’re included in an invite, seemingly any time I get a response to the invite, emClient tries to update the calendar for other people. This appears to be somewhat random in whose calendar the update is attempted for.

For example, I sent out an invite yesterday for 4 people, A, B, C, D. The initial invite went out fine with no issues. C responded and I got an error updating A’s calendar.

I looked through the settings and didn’t see any mechanism to disable or otherwise control this behavior.
Any insight would be appreciated.