Search Contacts Records APi behaviour does not work the same than Deals ?!

Search Contacts Records APi behaviour does not work the same than Deals ?!

Hi there,

When i request the records from the 'Deals' module by the Search Api with following criteria  "Account_name.name:equals:CustomerCompanyName", the api well returned the related records if there are. Fine !

But when i request same Api with the same criteria "Account_name.name:equals:CustomerCompanyName", in Contacts Module , the api response is 204 and does not return any record even if there are to be returned ?!

Could you help or fix please ?

Thanks,