Video playback pause and skips

Hi all,

I have been running osmc on a RaspberryPi 2 for about 10 months now. Mainly for streaming videos from my NAS via FTP through a wired connection. I have been using all defaults for setting since with no issues with this set up but over the the last week it has having issues with video playback.

The problem is at no specific time of playback the video pauses for a period and then skips forward roughly the amount that is was paused. This happens on average 4-5 times in a 20 minute video with no regular interval. The problem is the same no matter type of file being played.

Does anyone have ideas of what might be causing this?