Oracle 21c PRAGMA autonomous_transaction causes infinite execution

Question

Exectuion of provided code causes infinite execution.

CREATE TRIGGER UnosRokPlacanja
BEFORE INSERT ON StavkaFaktureKD
REFERENCING NEW AS NEW
FOR EACH ROW 
DECLARE 
    rok_placanja_temp DATE;
    pragma autonomous_transaction;
    BEGIN
        SELECT rok_placanja
        INTO rok_placanja_temp
        FROM FakturaKupac
        WHERE broj_fakture_kupac = :new.broj_fakture_kupac;
        EXECUTE IMMEDIATE 'ALTER TRIGGER ZABRANAPROMENEROKAPLACANJA DISABLE';
        :new.rok_placanja := rok_placanja_temp;
        EXECUTE IMMEDIATE 'ALTER TRIGGER ZABRANAPROMENEROKAPLACANJA ENABLE';
        COMMIT;
    END;

Purpose of the trigger is to modify property rok_placanja during insertion in StavkaFaktureKD table. This property cannot be modifyed directly using UPDATE statement, because there is another trigger which prevents this (because of business logic). When new record is inserted in StavkaFaktureKD, before inserting, trigger UnosRokPlacanja is activated and it retrieves rok_placanja from referenced record in FakturaKupac table. Retrieved rok_placanja will replace rok_placanja of the new record.

I'm going to provide some more scripts to make problem reproducible.

CREATE TABLE FakturaKupac (
        broj_fakture_kupac INT GENERATED BY DEFAULT AS IDENTITY PRIMARY KEY,
        kupac_PIB INT not null, 
        broj_ponude INT not null, 
        broj_racuna NUMBER, 
        rok_placanja DATE, 
        datum_dokumenta DATE, 
        ukupna_cena NUMBER,
        CONSTRAINT faktura_kupac_kupac
            FOREIGN KEY(kupac_PIB, broj_ponude)
            REFERENCES PonudaKupac(kupac_PIB, broj_ponude)
    );

CREATE TABLE StavkaFaktureKD (
    broj_stavke INT GENERATED BY DEFAULT AS IDENTITY PRIMARY KEY,
    broj_fakture_kupac INT not null, 
    kolicina NUMBER, 
    jedinicna_cena NUMBER,
    rok_placanja DATE,
    CONSTRAINT broj_fakture_kd_stavka_fakture
        FOREIGN KEY(broj_fakture_kupac)
        REFERENCES FakturaKupac(broj_fakture_kupac)
);

CREATE OR REPLACE TRIGGER ZabranaPromeneRokaPlacanja
BEFORE UPDATE OF rok_placanja ON StavkaFaktureKD
BEGIN
    RAISE_APPLICATION_ERROR(-20001,'Nije moguca izmena vrednosti roka placanja!');
END;