Update of DAVDroid crashes phone, all data has been lost

The current version 1.9.1-ose caused an very hard crash of Replicant v6.0 build 0001 on a Samsung Galaxy S3. The system was unusable afterwards, every single app crashed immediately after I started it.

I was able to reproduce this behaviour for build 0001 and 0002 of Replicant:

• Install Replicant v6.0 0001/0002. (https://redmine.replicant.us/projects/replicant/wiki/ReplicantImages)
• Add Firmware for WIFI. (https://blog.fossencdi.org/nonfree-firmware-android.html)
• Configure WIFI connection.
• Update F-Droid repository.
• Install DAVDroid v1.9.1-ose.
• System will crash after a few seconds.