Gruntilda's Final Battle score doesn't save

[Staravia]

I don't know why, but I've FC'd this song like more than a couple of times, and everytime I scroll over it, it never says it's FC'd.
Everytime, I always swore that I FC'd it, so I decided to save a replay to see if I was being delusional.
Turns out I was right all along
I don't know if it's just this map that's doing that, but I'm going to save my replays from now on.