Another issue. Since I can't do much progress in my game as of now, I tried testing it on my crappy laptop to see if what I have so far works. It runs at around 15 FPS and the camera goes completely wonky, where it shifts back and forth (in a jittery manner from 0 to ~6000 on the X axis). I then replicated it on my PC where I capped the frames to 25 FPS and the same thing happened... it's kind of like a reverse dampening effect, where the jitter starts off slowly but increases rapidly.
Once in this immense jitter mode, if I move the window with the mouse cursor the camera freezes at a location (eg. x=6000). If I resize the debug window and leave the mouse clicked for a few seconds it resets the scroll location to that $ thing, but I think that's unrelated to this.
Same thing happens with 30 frames but at 35 frames, it just shifted like a pixel or two back and forth. I think it's safe to say it's dependent on the frame rate. At 37, the jitter isn't evident anymore.
I'm think you may have your hands full at the moment with that $ bug, but since this bug is dependent on framerate it may (or may not) help you with solving that bug too...
Additional info: this happens during a cutscene where the camera is zooming and scrolling to another object at the beginning of the layout. I'll be happy to provide anymore if need be.