Unable to see Master Contact on Puchase Order for additional suppliers on the contract

Summary: I was able to create a contract and added multiple suppliers on it. I created an additional Party Role (as supplier).

Example:

Supplier A: Primary

Supplier B, C and D: Additional Suppliers

When I go to the Purchase Order header for a Supplier B. Master Agreement field, the contract is not available to be selected.

Is this a standard functionality?

Content (please ensure you mask any confidential information):

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

25c

Code Snippet (add any code snippets that support your topic, if applicable):