Looks like it happens just on my 2nd mixconsole window, where I’ve hidden the left, right, and lower zones.
As soon as I show one of those, or drag the mixconsole window’s edge to resize slightly, the ghost scroll bar disappears and I can again see the track colors.
Bug?
yes, thats true, i noticed this since the very beginning of C12, it always happens if there are less tracks than the size of the mixer window.
i found a workaround solution for me, i have enable the right side view (controlroom or master out ) and then suddenly it wont happen anymore