I believe that this was said on another thread and happens on Stable release stream too. I believe.I checked stable and it doesn't for this map. The negative movement frames aren't visible and the cursor just appears out of nowhere towards the first note. Tom broke the leadin time that is applied when it loads, so loading time affects what part of the replay you're in.
Edit: Okay this behaviour does happen on stable, but it's more buggy with the negative replay frames shown.