Dragging down

Hog 4 + Switch DP8K Ausu Laptop
How I run my shows, I use a laptop for a backup
This was fine in the past but I am finding on the latest release that the Laptop is dragging the H4 down.
The clear button would take much longer to Clear and the touch screens would be real slow in responding.
As soon as I remove the tracking backup laptop all went back to normal ?
Robin