When I finished my editing and play how it looks - vide looks geat, but after export i see something like a glitch between my primary footage and added b-roll
Does it happen with export through Adobe Media Encoder as well as direct export from Premiere Pro?
Try updating or rolling back your graphics driver directly from the video card manufacturer’s site. If NVIDIA, do a clean installation of the 517.40 Studio Driver (NOT the Game Driver)
Try turning off Hardware encoding in the Video tab of the export settings.