I could reproduce the problem, which is exactly as said as above. I have contacted Doodle about it.
Also, ical4android has been modified to be more robust in such cases. The changes will be incorporated into the next DAVdroid version.
I"m using the latest version of DavDroid, against a custom server built using sabre/dav. The server syncs fine to ios. Pretty much right after I hit the sync arrows I get an error - as per https://paste.fedoraproject.org/paste/hWppqzXUs8ujjg~SIZrY4A. Anyone have any ideas?
java.io.InterruptedIOException: thread interrupted
Looks like the sync has been cancelled. Maybe you hit “Cancel sync” in Android settings, or there is some “battery saver” active?