can't handle submit button

[zooogii]

On login page, i have UForm with validation. when clicking on register modal(UModal with #content slot) included Uform with validation, submit button doesn't trigger. if i focus on input, validation works automatically. when clicking submit button after filling all required fields, there are no error on validation(logged in the end of validation function). But no response(also logged in submit function) in submit function. how to fix it? i can't get it?