this occurs on postgresql 17.2 and did not occur on any previous version including 16, 15, 14. apologies if this has already been reported but I didn't see any means of looking up existing issues
$ psql -U scott -h pg17 test Password for user scott: psql (16.3, server 17.2) WARNING: psql major version 16, server major version 17. Some psql features might not work.