Since yesterday or the day before I am facing the problem that my tasks on my mobile phone will not get synchronized with my CalDAV/CardDAV server (but Calenders and Contact sync is still working).
When opening DAVx5 app on my mobile phone a welcome screen appears and after submitting “Next” a screen appears to chose a task app. I have never seen this before. If I want to chose my already existing (and in the past working) OpenTask app, only the Play Store app will be opened but OpenTask is not chosen in DAVx5. Same is when choosing and installing Task.org app (I have tried this to today for verification reasons).
When checking the settings in DAVx5, in “Integration” section, for Task app it is stated “No compatible task app found”.
Both apps, DAVx5 and OpenTasks are not impeded by any battery optimization, permissions are also set for Tasks. Running Android 11 with security update from 05.10.2020 on a Pixel 3 phone.
Running DAVx5 in version 3.3.5-gplay (303050000).