Dell USB3.0 dock D3100 - Keyboard

Hello,

Looking for some Help inregards to either the Vostro 15 3510 Laptops or the USB 3 Docks.

When the mouse and keyboard are plugged into the dock , there is an intermitten issue where it will miss certain keystrokes or spam a letter (Lie Thisssssssssss), the mouse would also jump accrose the screen and sometimes just go sluggish. we have over 40 vostro laprops and Docks and its effecting all of our users.

 I have updated the drivers for the dock and laptop using dells own software including Bios/fimrware (the laptops are also fully updated with windows updates) I have swapt the docks and keyboards around but it is effecting everyone.

Any help would be appreciated - Thank you

Callum