I ended up finding the solution myself. It was apparently a firmware update that wasn't applied in Windows Updates. 
Hello everyone, I was issued this laptop for working from home. I bought a KVM switch so that I could use it with my existing PC peripherals. My company also sent me a Dell Universal Dock D6000. When I attempt to use either of these devices to run both my mouse and keyboard through a single USB port, I find that the mouse and keyboard constantly disconnect and reconnect, either fully, or by not taking inputs for a couple seconds at a time, but remaining powered. The issue is worse when I am running the software that manages the mouse and keyboard. The issue also occurs on the Latitude 3520 I have. I'm worried this may be an issue with the speed of the USB ports. Has anyone experienced a similar issue? Thanks
Latitude 5520 USB disconnects when running multiple devices