Game breaks after being paused for an hour

I was in the last map of the game and in the second area. I paused the game and didn’t come back for an hour and 30 minutes. I unpaused and there was no music, beat symbols weren’t moving, and enemies were docile/stuck in place. I was gonna replay the map anyways so I’m not mad about having to restart. Also, I didn’t get a chance to record a video

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