If you change an event on your GCal, it will update for participants and/or collaborators but it will not update back in Ethnio. It can be a great way to add a special note or single unique Zoom link for a particular sessions, but keep in mind any of the following changes to a calendar event in Google may cause the event to not update in Ethnio:
- Adding guests
- Changing the description
- Removing guests
- Updating location
The good news is, using the Update Existing Events Button from Scheduling >> Calendar Events will fix any modified events, and in some cases even rescheduling or cancelling the event will also re-sync it.