The Legend of Zelda Twilight Princess Question?

I was playing my Game trying to beat it as fast as possible. When I got to the part with the last tear of light bug boss, I skipped the cut scene to save time, however then when i was waiting for it to come at me, i realized that the bug wasn't there. I have tried warping away and coming back, but the bug is just missing.

Do you think that this is a problem with the game disk, or did the game's save file just trick itself into thinking something that that makes this save file wont work?

Basically, should I start my speed run over, or do something else?