I GOT7, we are aware that the view count for #GOT7
#Look M/V has decreased again from 15M to 14M. We will be reporting this problem to @YouTube @TeamYouTube and hopefully we can resolve this issue soon.
It is important to continue to stream the M/V as much as possible! 

Also, is this happening around the same time reach day? If so they must have installed a purging algorithm to trigger for high volume videos.