I only have around 30 games set up thus far, and the program still experiences these hiccups even if i'm focused on a platform with only a couple games.
But now, here's a weird one for you. I hooked up my Dual Shock 4 to see if I still experienced the hiccups using the trackpad on it, and the problem seems to be cured? Even after disabling the controller again, there's no more input lag while using LB. I'm so confused right now, but I guess it is fine and better not to question things?? >.>;