BUG #16028: JDBC currentSchema connection parameter not working for text search configuration

The following bug has been logged on the website:

Bug reference: 16028
Logged by: cd a
Email address: cdalxndr(at)yahoo(dot)com
PostgreSQL version: 10.3
Operating system: Windows 10
Description:

Using a java spring app with connection:
jdbc:postgresql://localhost:5433/postgres?currentSchema=dev,public&ApplicationName=myapp
Schema 'dev' has fts configuration 'en'.
Query (debugged PgPreparedStatement):
select * from dev.category where category.language='en'
the param 'en' is registered with oid (paramType) 3734 corresponding to
'regconfig' type

Query results in: ERROR: text search configuration "en" does not exist

The same error is shown when running the query in PgAdmin if search_path
doesn't contain 'dev' schema. With 'dev' in search_path, the query is ok.
I was expecting that 'currentSchema' connection parameter will be used to
resolve fts configuration to 'dev' schema.