When an external sender invites me to a recurring event series, I would like to be able to decline single instances of that event.

Desired MVP user experience:
1. Person invites me to a recurring event series
2. When I need to decline a single instance of an event, I go to that event on my calendar and set my "Attending?" status for that instance to "No, I won't attend"
3. I am prompted whether I'd like to decline just this event, all future events, or the entire series. I select 'this event'.
4. The single instance of the event is no longer on my calendar, and (bonus points!) the person who invited me is notified that I've declined that instance. All other events in the series are unaltered by this action.

Current broken user experience:
1. Person invites me to a recurring event (e.g. Weekly on Monday from 9-10am), I accept and the event is on my calendar. So far so good.
2. Eventually I need to skip one upcoming instance of the event (e.g. the single instance on Monday October 14, 2024 from 9-10am), and want to decline the invitation for that single instance so that my calendar is accurate and to notify the person who sent the invite that I've declined that instance.
3. I go to Proton Calendar on web (or any other platform), find the instance of the event, and try to set "Attending?" for that instance to "No, I won't attend".
<BEGIN PROBLEM>
4. A modal pops up that reads "Update recurring event - Would you like to change your answer for all the events in this series?" with options of "Update" or "Cancel"
5. Neither option works; clicking "Update" declines all events in the series, and clicking "Cancel" makes no change.

These are both not the outcome I want. I don't want to get rid of the entire series. I don't want my calendar to be inaccurate when I know I won't be attending an instance of an event, or to leave the person invited me with inaccurate information that I'll attend when I know I won't.
<END PROBLEM>

This is basic MVP calendar app stuff, and I'm going to have a hard time using Proton Calendar (and by extension, Proton Mail, and if not either of those then probably scrapping the full suite) much longer without it.

Is there any hope of getting this sort of table stakes digital calendar functionality prioritized?

If not, just say so and I'll show myself out, no need to drag this on.