The MX Master 3 is quite laggy/stuttering compared to my 2S. I find it very annoying especially when I'm working. The battery is fully charged and the mouse is connected to my MacBook Pro 13" 2017 (non-touchbar) via Bluetooth. I did not experience this on my 2S. I hope you can fix this via software update. I am currently at macOS Big Sur (11.5).