I hope I can explain this well: Recently, many recurring events from Google Contacts, namely birthdays and anniversaries, now appear in Google Calendar as invitations from "Unknown Organizer <unknownorganizer@calendar.google.com>" that I have accepted (but I have not.) These events keep triggering pop-up notifications. Those notifications do not respond to the Dismiss or Snooze buttons - they do nothing. I can dismiss the dialog box with the upper-right [X], but the pop up gain every time the calendar re-syncs. I try to edit the properties of the event, but the changes do not take. When I look at Google Calendar directly with my browser, these events do not show up, only the proper ones that are listed in my Birthdays calendar. Why did this happen, and how can I fix this. The un-dismissable notifications make Thunderbird Calendar unusable. I find many similar (but not necessarily identical) complaints going back years, but no actual solutions. Thunderbird 140.2.0esr Windows 10 22H2 Cardbook address book add-on 100.4