Appointments+ : "order_by" not working in shortcode


I'm currently trialling your product.

I am testing out a shortcode to display to service providers but the order_by is not taking any effect. I want to show the appointments happening in chronological order, ie by start time.

I saw this in a recent support ticket from a few months ago and it said it was resolved.

My shortcode is:

[app_my_appointments status="confirmed" title="" provider="1" order_by="start" order="ASC"]

Instead, it is sorting by ID, ie in the order that the appointments were made.