I often create several reminders for each Thunderbird calendar event. Quite often it is difficult to see which reminder has just been triggered and if there are any others besides this one
For instance I might think I created a 4hr + 2hr reminder. So I think I'm dismissing the 4hr expecting the 2hr to appear later, but it's not that clear if this is the case (especially if you factor in using snooze).
To figure out which reminders "I do have" I have to manually load the calendar, click the event, bypass the intermediate screen, then click on reminders to see which reminders I actually created.
If the reminder told me which reminder had been triggered it would be so much easier. See attached for an example of how it might work.