Excel scrolling (up/down — left/right) is glitchy and almost unusable since downloading this beta. I tried vertical and horizontal scrolling with my old Logitech Performance MX mouse, and scrolling worked in Excel perfectly. As soon as I scroll with this MX Master 3, it gets VERY glitchy and unusable. This is VERY disappointing because scrolling in excel is 90% of the reason I purchased this mouse! I hope that this can be fixed. It seems that the horizontal scroll shoots the worksheet way to the right as if the columns per scroll is 50. I'll write again as I narrow down the problem.