BBP_DOC_CHANGE_BADI not triggered for custom fields in shopping cart header
I have a custom field in shopping cart header. I would like to perform some operations based on value entered in this field(on F4).BBP_DOC_CHANGE_BADI doesn't get triggered while changing value.
a)Whereas this gets triggered for any change in other standard fields.
b)Value goes missing from this custom field as soon as I change value for other standard field.