NFS Performance Issue

I have had many years of flawless kodi experience. I switched to the Asus Chromebox a year ago and it worked great. I have a large NFS server and have gigabit wiring throughout my house.

A few months ago (maybe linked to an update) I noticed that on some videos (particularly 1080p) that it froze and then 5 seconds later fast forwarded about 5 seconds in the video. At the time I did testing on Kodi on my laptop and found it didnt have this problem and assumed I had some hardware issue. I purchased a cheap Android box (without the questionable add ons) and am having the same issue.

Does anyone have any idea why this is occurring and how to fix it?