iCloud CalDAV calendars keep showing as “Disabled” or “Unavailable” in Home Assistant

Configuration
1

Hi everyone,

I’m trying to connect my iCloud calendars to Home Assistant using the CalDAV integration, but they keep showing up as “Disabled” or “Unavailable” after a few minutes, even though they initially appear and load events correctly.

Here’s what’s happening:

  • I added CalDAV manually via YAML and also tested through the UI.
  • The connection works at first — my iCloud calendars (Perso, Personnel) appear, and events are displayed correctly.
  • But after a short time, the entities go into a “Disabled” state or show messages like “Was turned off” / “Became unavailable.”
  • On the dashboard, the calendar card shows “Disabled” and no data.

I’m using my Apple ID (which is a Hotmail address) and an App-Specific Password generated from appleid.apple.com.
My current YAML looks like this:

calendar:
  - platform: caldav
    username: "[email protected]"
    password: "abcd-efgh-ijkl-mnop"
    url: "https://p39-caldav.icloud.com"
    verify_ssl: false

The connection succeeds, but after a few minutes, Home Assistant seems to lose access and disables the entities.
Even reloading or restarting doesn’t always help — sometimes I need to delete and re-add the integration.

Has anyone managed to keep iCloud CalDAV calendars stable in HA?
Do I need a specific server endpoint (instead of p39)?
Or should I switch to the ICS (iCal) method instead for reliability?

Any help or working configuration examples would be awesome :pray:

Thanks!