Running a Simple Update Statement Fails, Second Time Suceeds.

Here is simple query, I am running via function call. This statement runs fine as SQL but when put in function as plpgsql it failes with error below, when I ran second times in same session it succeeds:
--
product_master_fdw=> \set VERBOSITY verbose
product_master_fdw=>
select sddf_update.tps_update_1(p_pres_id_in=>50241::integer,
p_last_audit_update_dt_in=>'2019-09-03 12:44:21.356638'::timestamp ,
p_audit_update_user_name_tx_in=>'abc(at)xyz(dot)com'::character varying,
p_major_class_name_tx_in=>'TEST0826222'::character varying,
p_effective_dt_in=>CURRENT_TIMESTAMP::timestamp
);
ERROR: XX000: cache lookup failed for type 196609
CONTEXT: SQL statement "UPDATE product_history.external_sys_class_code_pres
SET class_code_id =
CASE WHEN p_class_code_id_in='0.000000001' THEN class_code_id ELSE p_class_code_id_in END ,
major_classification_cd =
CASE WHEN p_major_classification_cd_in='.000000001' THEN major_classification_cd ELSE p_major_classification_cd_in END ,
major_classification_name_tx =
CASE WHEN p_major_class_name_tx_in='0.000000001' THEN major_classification_name_tx ELSE p_major_class_name_tx_in END ,
coverage_short_name_tx =
CASE WHEN p_coverage_short_name_tx_in='0.000000001' THEN coverage_short_name_tx ELSE p_coverage_short_name_tx_in END ,
coverage_name_tx =
CASE WHEN p_coverage_name_tx_in='0.000000001' THEN coverage_name_tx ELSE p_coverage_name_tx_in END ,
cdt_source_system_cd =
CASE WHEN p_cdt_source_system_cd_in='0.000000001' THEN cdt_source_system_cd ELSE p_cdt_source_system_cd_in END ,
cdt_submitting_country_cd =
CASE WHEN p_cdt_submitting_country_cd_in='0.000000001' THEN cdt_submitting_country_cd ELSE p_cdt_submitting_country_cd_in END ,
cdt_status_cd =
CASE WHEN p_cdt_status_cd_in='0.000000001' THEN cdt_status_cd ELSE p_cdt_status_cd_in END ,
effective_dt =
CASE WHEN p_effective_dt_in=TO_DATE('01/01/1600', 'mm/dd/yyyy') THEN effective_dt ELSE p_effective_dt_in END ,
expiration_dt =
CASE WHEN p_expiration_dt_in=TO_DATE('01/01/1600', 'mm/dd/yyyy') THEN expiration_dt ELSE p_expiration_dt_in END ,
audit_insert_user_name_tx =
CASE WHEN p_audit_insert_user_name_tx_in='0.000000001' THEN audit_insert_user_name_tx ELSE p_audit_insert_user_name_tx_in END ,
audit_update_dt = CURRENT_TIMESTAMP,
audit_update_user_name_tx =
CASE WHEN p_audit_update_user_name_tx_in='0.000000001' THEN audit_update_user_name_tx ELSE p_audit_update_user_name_tx_in END ,
latest_version_in =
CASE WHEN p_latest_version_in_in='0' THEN latest_version_in ELSE p_latest_version_in_in END ,
delete_in =
CASE WHEN p_delete_in_in='0' THEN delete_in ELSE p_delete_in_in END
WHERE pres_id = p_pres_id_in
AND audit_update_dt = p_last_audit_update_dt_in"
PL/pgSQL function px_co_pr_pres_pg.spt_update_1(bigint,timestamp without time zone,timestamp without time zone,character varying,character varying,character varying,character varying,character varying,character varying,character varying,character varying,character varying,character varying,character varying,character varying,timestamp without time zone) line 7 at SQL statement
LOCATION: getTypeOutputInfo, lsyscache.c:2681

Regards,
Virendra

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