I guess that this is a duplicate #578, as @untitaker said. Please follow up there.
Calender sync not done after change
I use Acalender App and sync configured for 120 mi + when change done. But do not see thst sync done acvording this shedule. Why
Same as https://forums.bitfire.at/topic/2136/lists-syncing-contents-not? Can you provide logs? Without verbose information, we’re not able to say “why”.