FieldSettings not included for Blocks

[horacioj]

Piranha v 9

Let's say you have a block like this:

    [BlockType(Name = "My stuff", Category = "My Category", Icon = "fas fa-fish", IsGeneric = true, ListTitle = "Title")]
    public class MyStuffBlock : Block
    {
        public StringField Title { get; set; }
        public TextField Body { get; set; }

        [Field(Placeholder = "Select any product from the application")]
        [ContentFieldSettings(Group = "Product")]
        public ContentField Product { get; set; }
    }

In the Manager you are allowed to select any content instead of just products.
The same code as Region works as expected.

Additional info by @GangsterGeek89 :

using the vue developer plugin I have just noticed that when a content field is in my page region it has settings object with the property group correctly set but when the content field is in a block the settings object is null. Pics to follow