Issue in IBY API - IBY_EXT_BANKACCT_PUB.check_ext_acct_exist

1. We are using the "IBY_EXT_BANKACCT_PUB.check_ext_acct_exist" to check if the bank account exists. The API returns "S" and returns the "x_acct_id" even though Bank Account Owner is end-dated in iby_account_owners. So because of this further down the line we go ahead to create Joint Bank Account Owner<iby_ext_bankacct_pub.add_joint_account_owner>, but when we try to create an assignment using <IBY_DISBURSEMENT_SETUP_PUB.set_payee_instr_assignment>, the API fails with the below message:

result_code: INVALID_INSTRUMENT

ERR_MSG: API error occurred when assigning the bank account.