I have this problem since several months.
Whenever I play a movie full screen on kodi, and then switch away to another desktop for a moment, when I come back to the desktop with Kodi, the video is freeze-framed on the moment I switched away, but the audio keeps playing. To recover, I just tap arrow left, so the movie backs by 5-10seconds and playback is restored.
Alternatively, I can keep waiting on the freeze frame listening to the movie and eventually the video will unfreeze and start playing where the audio got by then. But it can take up to a minute and sometimes even longer. Obviously, I want it to start playing as soon as I change back to the screen.
My GPU is Intel and I have latest drivers installed. I am on Arch with xorg and compton composer.