Through The Fire and Flames Co-op, I really don't know what happened during the solos

This was after my stream, which I ended due to dinner. I only had a bit of time so I didn't bother starting the stream again. This was my first time playing the lead part in through the fire and flames co op version. While I have seen it before, I never got the chance to play it because I rarely do co op, and guitar hero 3 doesn't let you practice this (I gotta give it up to people who fc this, its gotta be crazy). At about the solo the star power of the other person didn't seem to run out, and I have no idea if that affected our score. Being an old game, I'm not surprised that glitches like that happen, although I was not expecting it. All rights belong to the band Dragonforce. The song is Through the Fire and Flames.