Would upgrading from 11.6-2 to 11.7-current give us any performance advantages? We are seeing intermittent performance problems that come and go. Also are there any fixes for the wal_sender and pg_basebackup between the versions?
You can peruse the release notes online but regardless the project policy is that you should never not apply a minor release update (though we also don't use 11.6-2 version numbering...).