Hi David,
I didn’t fix it. Support told me they fixed it by deactivating a setting in another plugin called: advanced free shipping. The setting was to hide other shipping methods if free shipping is available. Even though they said it fixed it, it didn’t.
I found another plugin:
https://nl.www.ads-software.com/plugins/oik-weightcountry-shipping/
It works great for me.
Hope you’ll find your solution.
With Kind Regards,
Puna