Magento support said this is a known error, but did not offer any solutions. I'm currently using the Community Edition.
Are there any known fixes that a non-developer could do?
My best suggestion would be that you try and convert the current rule into a "Shopping Cart Price Rule".
In a Shopping Cart Price rule you can also set conditions that depend on the subtotal of the cart, the shipping region, shipping country, ...
In the action tab you can easily Free shipping option to "For shipment with matching items"
Maybe worth a try
Thank you @KentChrDK, I'm currently using the shopping cart price rules - and had tried what you had suggested. Was there a better way to try from the start. (I'm new to learning Magento).
You're most welcome @DMiller
I don't think you could have done it any other way. I have been working with Magento since 2008, and in my opinion Tax, Pricerules, and Shipping is the most complex areas of the Magento platform.... So you did right by just asking
If the solution fixed you problem, please mark the thread as solved, for better navigation in the forum.. Thanks