MDG-C Dynamically make custom field mandatory not working

Hi,

We have custom fields in KNA1 table and added to the BP data model to bring them into Customer governance. The custom fields are marked mandatory/optional using Z table not the V_T077D.  Since its dynamic nature, extended the customer GENIL class CL_BS_GENIL_CUSTOMER - method GET_ATTRIBUTES_PROPERTIES to mark the custom fields mandatory on UI. Custom fields in Customer UI, are marked mandatory, however, if I don't enter any value in the custom field, and hit the check, system returns successful instead of asking the user to enter value in Mandatory field. Is am missing something. and possible F4 list does not have space value, all are with values. Your help is highly appreciated.

Field marked Mandatory:

Check returns successful:

Thanks, Rajiv