Autocompletion for \sf does not work if there is more than one function

The following documentation comment has been logged on the website:

Page: https://www.postgresql.org/docs/17/app-psql.html
Description:

test=> \sf+ app_con<TAB><TAB>

test=> \sf+ app_config
ERROR:  more than one function named "app_config"

I expect to see arguments types: void or jsonb like:
test=> \sf app_con<TAB><TAB>
void jsonb

Because definition for those functions are:
 Schema |    Name    | Result data type |
>
--------+------------+------------------+------------------------------------------------>
 public | app_config | void             | config jsonb
>
 public | app_config | jsonb            | keys text[] DEF

Best regards.