I use Roon on an 8 inch tablet. Since the vol control popup became smaller some version ago I have difficulty actuating the slider by swiping the slider knob. It’s too small and too close to the + - knobs.
This now got even worse in the new 1.5. The dimensions look to be the same, but now its even more difficult to hit the right spot. Maybe the bounding box was made smaller in the UI.
Please make the area of the volume control bigger again or user definable.