I saw this come up at [HOWTO] Sync your contacts, calendar events, email, notes and tasks to /e/ - #39 by dinodorado again, leading me to pour the UX issue you pointed out in this thread into an issue (as it applies to both - newly created - calendars and tasks) - https://gitlab.e.foundation/e/backlog/-/issues/8070
Do you see any errors? then I’ll edit the issue. I did again reproduce this in current versions and I think this still applies.
The code to do the auto-sync will need to land in Account-Manager / DAVx5 - or it’s already there and not invoked.