[fritsch]

The "ds" clearly show that whatever happened is totally unknown to kodi - nothing in the log. No resync, nothing - absolutely nothing.

Now - try - as asked some weeks before: Set your resolution to 1080p, play the same video again, let it scale down with "bilinear" scaling. Same artefacts?

I know, nada in the logs, it's not good...
 How do I hard set to 1080p? 

 xrandr --output YOUROUTPUT --mode 1920x1080

And in kodi disable "Adjust Refreshrate". Make sure you manually set scaling to bilinear - as otherwise it would stutter like hell as the GPU is too slow to do lanczos 3 downscaling.