~Hakurei Shrine~ > Rika and Nitori's Garage Experiments
Sound effects...
Stuffman:
This sounds pretty strange to me. In PoSR the backgrounds in my stages would keep showing while bosses and spellcards were onscreen (until I recently disabled them during spellcards to save processing power, anyway).
Do your attacks/spellcards have a @Background in them? Mine don't, and they're not necessary. If they do, try taking them out. They might be overriding the @Background of your stage.