Elemental rewards from dark odin boss

[zygarte]

I try to get grade rewards by doing elemental damage, but I got only the first element grade rewards, using some config ways, none could work.

How can I edit config file for getting all elemental reward from King of Knights Magicite Dungeon: Dark Odin Record ?

[ThauEx]

I think this is a know issues and since I'm not playing this game anymore, I won't investigate that.