It is a very old issue, considering this is a 2014 post, and I am amazed that it hasn't been taken care of by default yet.
First post shows an image of what I mean, solution is at the bottom
PREFERENCES --> Show Settings --> All
Input/Codecs --> [ADVANCED] File Caching
Default 300ms ; changed to 10000ms
WORKED FOR ME.
I also increased my *Disc caching* and *Network Caching*
And then someone right below that (the last post on the page) states that 3000 helps plenty which I can confirm, haven't seen it happen in the past half hour.
Oh.. I didn't look on the forums here, so maybe it has already been posted *chuckle*