client.invoke isn't working with addon Menu Types.

Using the same code, I can have a Manifest that defines the same event for both an Addon Menu item and Job (online) action.

When calling client.invoke in client side JS, triggered from the Job Window, my Lambda function is called again with the relevant event information. Doing the same from the Addon does nothing. No JS errors. AWS shows no new call to the lambda function.

It's all the one piece of code, just the event is triggered initially from either the Job entity window or the Addon window.

Is the client.invoke not meant to work for Addon Menu Items?