The mouse will only transition to my tablet when going from my secondary monitor. My primary one does not allow me to transition to the tablet (unless I use a hotkey).
Guessing it may be a layout misconfiguration. Across regards multi monitors as a single monitor. Let's suppose that your primary monitor is left and secondary monitor is right, and you have located the Android tablet icon at the right side of your computer in the "Across Center". Then you can help but dragging the mouse cursor from the second monitor to your tablet. In this situation if you want to transition from your primary monitor, you should locate the Android tablet icon at the left/top/bottom side of your computer in the "Across Center", or switch the positions of primary and secondary monitors. If my guess is wrong, please let me know your computer environment and its OS. Thank you.