Halo 3 Campaign Checkpoint Framerate Stutter?

I have been working on the Halo 3 playlists this week and just today after the 1 GB patch, I noticed much more now (I don’t exactly remembering this before the update) every time I get a checkpoint in the campaign missions, the game tend to stutter for half a second almost every time and throws me off a little bit when this happens from the smooth 60 fps. Funny thing is when it says “Loading…done”, no such stutter happens, which is odd.

I don’t know if this happens in the other Halo games, I only noticed it now for Halo 3.