Repeating Tasks kills CalDAV for iOS.

[grahamgraham]

Description

I'm attempting to integrate Vikunja into my iPhone so I can get push notifications. The most straightforward path seems to be CalDAV with iOS' built in Calendar and Reminders.

I go through the steps, see that my test task populates correctly. AWESOME

I start adding tasks that I will need to be on repeat. Air filters, kitty litter, etc. I check one off the list (which, as I understand, will complete the task, then uncomplete it and create a new due date).
It stops working.

Ok, remove the offending tasks, and check again, and CalDAV works.

I used CURL and I can see the repeat tasks are still marked as complete, despite what Vikunja's interface shows. Interestingly though, the other task that's not repeating still does not show up. I checked the "Show Completed" option, and there's nothing that is received. In fact, just adding a new repeating task breaks the reminder account on iOS.

My setup:
iPhone 14 Pro on 18.3
Vikunja installed via script (https://community-scripts.github.io/ProxmoxVE/scripts?id=vikunja)
Selfhosted on home server, using cloudflared to expose my app to the public.
CalDAV URL: I've tried https://mydomain.xyz/dav/principals/username and https://mydomain.xyz/dav/projects/1

Vikunja Version

v0.24.6

Browser and version

No response

Can you reproduce the bug on the Vikunja demo site?

Yes

Screenshots

No response