Form level validation is not triggering on Submit

I am working on a form which has a form level validation which is configured to execute on Submit (using a!validationMessage(,validateAfter:"SUBMIT")). This validation is working fine when I am testing the interface. But when the interface is integrated to the process, validation doesn't trigger and form gets submitted without executing the validation.
Is there anything else that I should configure to make sure that validation gets executed before the submission of form?

OriginalPostID-245177