Bean have not updated values for relate field

Hi All,

I have a custom module "Observation Employee" and in it I am using a relate field of "Contacts".  I want to get the old and new  Contact name if it will changed while editing the existing Observation Employee record.

But the issue is when I get this field in bean then I receive old values. If I get some other field other than this relate field then I get new updated values.  Is there any different way to get the updated value for relate field ?

$bean->deviation_type_c (dropdown field: receive updated value)

 $bean->contacts_de_deviation_employees_1_name (relate field, receive old value)