What I did: Connected Agenda to my Google Calendars on my Mac.
What happened: Some events are duplicated, while others are not. These events can be from the same calendar. They can be re-occuring or one-time only. They can be all-day or not all-day. I cannot find anything that the duplicated events have in common. In each case, the duplicate events only show up once in Calendar.app.
What I expected: All events should show exactly once.
Things that might be helpful to know (Agenda version, OS and model, etc): Using Agenda 10.0.4 on macOS 10.15.5.
Example of duplicates in Agenda:
None are duplicated in Calendar.app: