How to Clear a pickup list value in Salesforce while updating from AWS APPFlow

Question

We are trying to push data into a custom SalesForce object using AWS AppFlow, the object is a multi select pickup list and expects 0-* items. The issue is once the value is set through AppFlow the value is not cleared when the property is set to null again. We are mapping the field to an Empty String when we want to clear it.

We have tried setting an Empty XML Tag but sadly that doesn't clear the value in Salesforce