I'm running TB 60.4.0. Here's the scenario. I receive an event invite from someone. I accept it, send a response, it shows on my calendar. Sometime later, I receive a cancellation for the event. Opening the cancellation there's no option to remove from calendar and a message at the top about the invite already being processed. The only way to remove the event is to delete it on the calendar. I cannot say if this started with the last