It seems our MNTP FieldProvider doesn't work with the pro version. It used to work while using the trial.

The FieldProvider is triggered, but whatever it returns from the Parse method is discarded. I guess AdvancedMNTPSettingsProvider overwrites the result?

I've tried adding both a high and low priority to no avail:

[FieldProvider(PropertyEditorAlias = "Umbraco.MultiNodeTreePicker", Priority = int.MaxValue)]
public class MultiNodeTreePickerFieldProvider : IFieldProvider
{
    public object? Parse(object value, IContentBase importedItem, ImportPropertyInfo property, FieldProviderOptions fieldProviderOptions)
    {
        ...
    }
}

We're using Umbraco 11.