The JDBC team has released version 42.3.6 to fix a regression introduced in 42.3.2
This fixes "cursor <unnamed portal 1> does not exist" when using ResultSet.setFetchSize from CallableStatement, fixed in 42.3.5 (see [PG #2377](https://github.com/pgjdbc/pgjdbc/pull/2377))
The driver downloads and web page can be found at [pgjdbc](https://jdbc.postgresql.org)
Thanks to all who contributed