Users receive email notifications for calendars they don't watch

One of our calendars, which isn't embedded in any page, has been sending email notifications to users who are not watching the calendar. Not all users are affected. There appears to be no way to unsubscribe them from receiving these notifications.

• The users' lists of watched items doesn't contain this calendar
• When the users access the Calendars page and select this calendar's drop down menu from the elipsis, they find that they are not watching this calendar (status reads "Watch" and not "Stop Watching" or "Watched")

I used this query to see if the calendar is embedded anywhere returned no results:

embeddedSubCalendarId:CALENDARID

This seems to be a known issue, as reported here: https://jira.atlassian.com/browse/TEAMCAL-3709

Is there any fix for this?

Workaround:

1. Manually access an URL for Calendars that are tied to the user profile:

   https://instanceurl/wiki/calendar/mycalendar.action

2. The user will be able to see a list of Calendars, including the ones that the same should not be watching.
3. Search for the Calendar and finally, click on Unwatch.

The user should no longer receive notifications from this Calendar after doing that.