Hi Yannik, thanks for your report! I am able to reproduce this and the problem is only present in the Debian package version of MariaDB.
This bug seems also described there: https://jira.mariadb.org/browse/MDEV-8457 If this is an acceptable solution until the bug is resolved, you can use the 10.1 (on 10.3 it is working too) version from official MariaDB repository. https://downloads.mariadb.org/mariadb/repositories/ Regards, Faustin
