As I just mentioned in your Talk article we have just released beta 1 for Agenda 1.5, which should fix the issues you’ve reported with the calendar. We have done a major overhaul of the way Agenda works with calendar events, alongside a bunch of improvements, fixes, new fresh look of the calendar selector and a few nice new features (like the ability to show events from multiple days at once). Most importantly it should be more robust when it comes to calendar reloading and having similar or identical events. It should no longer jump or excessively refresh the event list and also resolve calendar duplication and saving issues upon editing.
We’d like to ask if you could help us test the changes, you’ll find how to activate beta downloads here: https://agenda.community/t/help-us-beta-test-agenda/907