BUG #18531: err when using 'current of' with incremental COMMIT

The following bug has been logged on the website:

Bug reference:      18531
Logged by:          Dzmitry Jachnik
Email address:      dzja112@gmail.com
PostgreSQL version: 14.2
Operating system:   x86_64 GNU/Linux
Description:

I tried using 'current of' syntax (like doc. 43.7.3.3.)
and had have ERROR: cursor "bulk_collection_cur" is held from a previous
transaction

If using regular ` WHERE id = l_rec.id; ` I hadn't any error

EXAMPLE:
```

CREATE OR REPLACE PROCEDURE crm_import.etlp_deals(IN i_id bigint DEFAULT
NULL::bigint, IN i_limit integer DEFAULT null)
 LANGUAGE plpgsql
AS $procedure$ 
DECLARE

  result jsonb;
  COUNTER int := 0;
 
  bulk_collection_cur CURSOR FOR
          SELECT *
          FROM crm_import.deals dew
         WHERE COALESCE(dew.etl_stage,'NOT_LOADED') not IN ('LOADED',
'IGNORE')
--           AND dew.id = any(l_id)
           AND (dew.id = i_id OR i_id IS null)
         ORDER BY dew.load_date, dew.dt
           FOR UPDATE ;
begin

    <<COLLECTION>>
    BEGIN 
        FOR l_rec IN bulk_collection_cur
        LOOP 
            COUNTER := COUNTER + 1;
            RESULT := crm_import.etl_deals(row_to_json(l_rec.*)::jsonb);
             
            UPDATE crm_import.deals dsp
               SET etl_protocol = RESULT
            -------------------
            --v.1 SQL Error [24000]: ERROR: cursor "bulk_collection_cur" is
held from a previous transaction
            WHERE CURRENT OF bulk_collection_cur;
            --v.2 WITHOUT ERROR
            --WHERE id = l_rec.id;                     
            -------------------
            RAISE NOTICE 'counter= %', counter;
            IF mod(counter, i_limit) = 0 THEN
                RAISE NOTICE 'COMMIT';
                COMMIT;
            END IF;
        END LOOP;
    END COLLECTION;

end $procedure$
;
```
That combine 'current of' and 'commit' at one loop is bad idea?