I just submitted the application of visitor visa for my parents several hours ago through IRCC Portal. My father is the primary applicant, however, he didn't receive the UCI number in his application after getting payment confirmation and submission letter. My mother has received everything including the Biometrics Collection Letter. Is there anything wrong with my father's application? I have checked the documents and information several times before I submitted, i don't think there is anything wrong. Have you had such kind of experience before? Please help. Thanks.