I have a problem with the Shadow Cloud gaming software.
Unzwar, my mouse pointer is behind, no matter what Internet connection 4G, 50Mbts, 15Mbts.
I tested it on 2 pc's and on a laptop.
This is normal, it takes just until everything was sent and brought back.
How do you mean?
Shadow without input was practically impossible. That's one of the reasons why many demonize it.
Your input (mouse or keyboard) must be calculated to the server, then and then back to you. That will take time. I would never give up my PC for Shadow.