I am also having this issue on a brand new laptop (Ryzen 5 4500), however the dead mouse pointer is there from a fresh reboot. It is left over from the login screen and remains there once the system has logged in. If I logout, the 'dead' mouse becomes the only one on the login screen, yet loging back in causes it to freeze while a second pointer becomes active.
I am also having this issue on a brand new laptop (Ryzen 5 4500), however the dead mouse pointer is there from a fresh reboot. It is left over from the login screen and remains there once the system has logged in. If I logout, the 'dead' mouse becomes the only one on the login screen, yet loging back in causes it to freeze while a second pointer becomes active.
Very strange behaviour!