Object Validation Rule on Workers Assignment object is not working through HDL Load and REST API

Summary:

I have created a validation rule on Workers Assignment object to validate Department DFF with Legal Entity Identifier.

This rule works fine for all flows through UI. When I try to run the same code and test HDL Load and REST API, the validation fails.

Content (required):

I have created a validation rule on Workers Assignment object to validate Department DFF with Legal Entity Identifier.

This rule works fine for all flows through UI. When I try to run the same code and test HDL Load and REST API, the validation fails.

Version (include the version you are using, if applicable):