Basically, when moving the tixati window, it's really slow and it's lacking behind.

I have a really high-end PC and I tried closing everything while this bug is happening, still, it was slow as hell and just lacking behind.

It was like as if the window was sliding across the screen and lacking behind severely.

This isn't really that much of a huge problem, but it is mildly infuriating.

It is a known thing. Seems to be with wireless mice running at a high polling rate. I run my mouse at 125Hz when in Windows and don't have the issue. If the mouse is running at 1000Hz, it happens. I have actually seen similar behaviour in a game (believe it or not).

Why exactly are you moving the windows around?
if you need to keep high polling rates for your mouse dont move the windows around, or move the windows slower, or expect some delay.

I have a wired mouse and this happens. All other windows on the screen move normally except tixati.

"Why exactly are you moving the windows around?"

This seems like a very odd question. Why not? So I can use one window while viewing another?