BUG #16195: current_schema always return "public"

The following bug has been logged on the website:

Bug reference:      16195
Logged by:          Boris Kalimira
Email address:      kalimira.boris@gmail.com
PostgreSQL version: 12.1
Operating system:   CentOS 7 & Windows
Description:

Context: 
user "test" and schema "test" created on my DB.

Connencted as test user on my DB:
SHOW search_path -> "$user", public
SELECT current_schema -> public

Expectation -> SELECT current_schema -> test