Having the same issue - Windows 11 mouse lag and keyboard wonkyness. Only when using multiple monitors (using displaylink hardware) Seems to be solved by putting mouse and keyboard dongle in a ups receptacle within 20" of devices - plugged them into the displaylink dock on my desk.
Hopefully this will solve problem for now.
That being said, when operating under windows 10 the mouse could be 8' away and not in line of site without a problem.