Thanks for your efforts, but this is a duplicate of #170.
appointments not deleted from mobile
When I delete appointment on the Nextcloud server, it is not deleted from mobile.
Android 8, Samsung S7, Nextcloud 14, davdroid 2.0.5-ose.
Expectation: appointment gets deleted on mobile.
I cannot reproduce this problem here; everything works as expected here.
Please provide verbose steps to reproduce, Web server and CalDAV/CardDAV server logs taken while the problem occurs, DAVdroid debug info (DAVdroid / Settings / Debug info) and verbose DAVdroid logs etc as described in [READ BEFORE POSTING] What’s required to diagnose a problem.
it looks like same issue as here: