Cursor Freezes on Monitor

I just bought a one of the new MBP M1 13". I also bought a HDMI to USB-C cable in order to connect it to a second monitor (Samsung 32" curved). I use it as a second screen and whenever i move the mouse over to it it completely freezes and can occasionally move it back to the laptop screen but cannot use it on the 2nd screen at all. I thought the whole screen must be frozen but when I try to play a video on the monitor it plays fine its just the cursor that is unresponsive. When i change the settings to make it a mirror screen the mouse moves perfectly fine on the laptop screen but is still frozen on the monitor but nothing else on the monitor is frozen. Pls help