I have Razer Blade 15 - Base model 2019 (GTX 1660).
I made a video of the lag happening here :
Throughout the whole video I'm physically moving the mouse in a continuous circle, but you can see that several times the pointer stops responding.
As you can see in the video, it's happening even without significant CPU load.
I don't think the issue happens on built-in mouse pad, but I mainly use a mouse and the issue doesn't happen all the time so it's hard to be sure. I'm guessing it's some kind of driver issue, but I don't know how to begin investigating this.
Any ideas?