Hello Jeremy,
This is probably just an annoying cosmetic bug..
I'm using Metro 7.2.4 (Intel), OS 10.11.5
Using the SharpGray color scheme, if I go into the Instrument window/mixer, and group a few tracks together, the indicator light (just above the scroll bar) changes color.
If I then scroll the Instrument window horizontally, only the top 1/5th or so of the indicator light correctly redraws to follow the scrolling action.
This is not an issue with any of the other color schemes.
Again, this is probably just cosmetic, but I didn't see it noted anywhere.
Thanks,
-dean