I am using Affinity 1.7.3 on a MacBook Pro running OS X 10.13.6. The problem I am seeing happens when I have a photo opened and then open the Info Panel. I can set the Info Panel crosshair to anywhere in the picture to observe changes in RGB values as I make adjustments to the picture. If I open up an adjustment such as HSL, Color Balance, etc I can move the adjustment sliders and observe changes in the picture, however the Info Panel RBG values don't change until I release the mouse button. I have seen numerous videos where the Info Panel RGB indicators change dynamically with changes in the slider, but I can't get my system to operate this way. I observe the same behavior on my Mac whether I use the trackpad or an external USB mouse.
Does anyone have any idea if there is a way to get the Info Panel indicators to operate dynamically as the adjustment sliders are changed?