​Problem gets bigger over time. First its not noticeable, but after aprrox. 20 - 30 minutes it slowly starts getting worse.

Description:

Every time you hit a key and move the mouse at the same time the framerate/frametimes drop.

 

System (Video):

I7 4790k, 16 GB RAM, GTX 1080Ti, G-Sync Panel, NVME + SSD 

 

I could reproduce the problem on two other systems:

-          AMD 5800x3d, 32 GB RAM, RTX 3080Ti, G-Sync Panel, SSD 

-          Asus Zenbook, 8GB RAM, i7-6500U, GeForce 940M 2 GB VRAM, SSD 

I know about another system having the same problem:

-          3060 Ti Ryzen 5 7500F 16GB Ram