Frappe Cloud Child Table Data Saving Issue

In the frappe app We are saving the data in the child table doctype in the customer doctype, its working fine on local app, but the same flow is not working on the frappe cloud

I have checked the payloads on the both envoirnments, on local server when i select the contact on that field and saved it, it sent it into payload,

but on the frappe cloud its not sending in the payload when i click on the save button, and its clear the field when the save button click

Flow:
I have added a Custom DocType Report Subscribers, having a field named Subscribers (fieldType = Link, Options= Contact)

Then I have added a custom field named Daily Report Subscribers in Customer DocType, this field have FieldType = Table MultiSelect, Options= Report Subscribers.

When I select contacts in this field in the customer doctype it saved into Report Subscribers, its working fine in the local app, but not saving in the frappe Cloud