Why is there no crown symbol next to the red mickey symbols?

In Kingdom Hearts Final Mix for PS4, I cleared all the gummi missions for beginner difficulty. I got a bronze crown symbol next to the red mickey symbols for doing so. When I cleared the missions for normal difficulty and also proud difficulty, I didn't get a crown symbol at all. What gives? Is there something else I have to do to get the crown symbol? I would be very grateful if someone could solve this mystery, as it has been really bothering me. That is for beginner mode. I didn't get any crown symbol for normal mode or proud mode, and I have finished all of the missions in both of those modes as well.