How could I make the autocomplete rule work for adding a contract extension?

Summary:

We made an autocomplete rule for the following situation; for a contingent worker (CWK) the only allowed contract type (for new joiners + contact extensions) is "Hiring Agreement". The rule get's triggered when you add a CWK or edit a contract extension of a CWK and select a contract type other than "Hiring Agreement", but doesn't trigger when you add a contract extension for a CWK.

Content (required):

The rule doesn't trigger whenyou use the add button in the screen below:

The rule does trigger when you use the edit button.

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