Smartform does not check empty field of related entity in smart multi input

[Santiago789]

Hello experts, I am using smart multi inputs to select my business partners in a one-to-many relationship but the smart form does not check that it should be mandatory even though nullable false is in the backend

                            <smartMultiInput:SmartMultiInput
                                id="sfBusinessPartner"
                                entitySet="Business_partners_per_agreement"
                                value="{BUSINESS_PARTNER}"
                                supportRanges="true"
                                supportMultiSelect="false"
                                mandatory="true"
                            />

validationMode="Async"

using standard validation mode after doing the check it does not recognize that the field is no longer null

Thanks for any help

Regards,

Santiago