i cant find supernova ;-;

i played vivid/stasis before 5.0 and was able to play supernova (the song by kyotsugyon) in rhythm play. when the 5.0 update was released, i chose to restart my story progress. i have completed the puzzle that lets you play supernova in chapter 4. after i completed the song, i remember it saying that i unlocked it, but it never showed up in rhythm play, so the only way i can play supernova is by going into the puzzle room in the node flowchart. i was wondering if this has happened to anyone else and if anyone knows why.