Google calendar add-on - Prevent multiple event triggering

I am developing a calendar add-on. According to my use-case, the add-on needs to be updated for the below scenarios.

1. Once the user opens an event.
2. Once the user adds/deletes a guest from the guests list.

Now I am facing a performance lag for the second scenario, can see calendar.eventOpenTrigger has been called multiple times when I am adding a new guest. Is there any to prevent multiple event triggering?

Manifest

"calendar": {
  "eventOpenTrigger": {
    "runFunction": "onCalendarEventOpen"
  },
  "currentEventAccess": "READ"
}

Trigger Function

 function onCalendarEventOpen(e) {
  console.log(e);
  if(e.calendar.attendees) {
    var emails = e.calendar.attendees.map(attendee => attendee.email);
    if(emails.length > 0) {
      var w2pData = w2pClient().getUsersList(emails);
      return buildW2pCommunicationCard(w2pData);
    } else {
      return createHomeCard();
    }
  } else {
    return createHomeCard();
  }
}

Log