`wsrep_sst_receive_address` defaults to `wsrep_node_address`.
When `wsrep_node_address` is set to an IPv6 address and `wsrep_sst_receive_address` is not set or set to its default value of 'AUTO', `wsrep_node_address`'s IPv6 address does not seem to be parsed correctly. SST fails with:
I have not tested this with another SST method than rsync. Omitting brackets around the IPv6 address in `wsrep_node_address` does not make a difference.