I am having trouble with slow refreshing of images and slow keyboard and mouse commands at intermittent times. I’m using a Lenovo Flex 5 Laptop thru a Pluggable USB 3.0 Sharing Switch (USB3-SWITCH2) into the Pluggable docking station which is in turn hooked up to my 43" Dell monitor & my 32" LG monitor. I have a Logitech K270 keyboard and a Logitech Anywhere Mouse connected with a Logitech unifying dongle also plugged into the docking station. I also have my desktop computer connected to the sharing switch as well. I know the docking station supports 4K displays, but does it specifically support this LARGE 43" MONITOR (Model U4320Q)? And what about the Sharing Switch?
Could that be the problem?