Missing required privilege CONNECTION ADMIN

Maybe this is just a documentation glitch, but when I set up a backup-user with the privileges as described here and then run mariabackup under this user, I see `Missing required privilege CONNECTION ADMIN`.

Now, I don't mind adding this privilege for the backup-user, but the fact that the documentation doesn't mention this makes me wonder if I'm doing something wrong..

Now because I'm running a Galera-cluster using mariabackup as SST-method, and SST-documentation states that "The user account that performs the backup for the SST needs to have the same privileges as Mariabackup, which are the RELOAD , PROCESS, LOCK TABLES and REPLICATION CLIENT global privileges.", I'm wondering if I also should be adding the `CONNECTION ADMIN` privilege to the SST-user..

.. or am I just chasing a red herring, since everything seems to be running smooth? It's all a bit confusing to me.