You should indeed...🤔 Check you haven't missed an ending? Or perhaps redo an ending and the game might realise that you have them all??
I'm really sorry to hear that, I hope it didn't sour your experience of my game too much.
Did you also re-do any of the Special Route ending? If that doesn't work, redownload the game- I just updated it, and should have fixed that error (though that may just be pointless since you'd have to play through every ending again...)
Apologies again, coding is still quite new to me.