This is actually a normal part of how YouTube validates views. Temporarily slowing down or even freezing a video's view count is expected, here are more details about why this happens and how it works: https://goo.gl/S7DIry
You might see discrepancies in the data displayed on various sections/pages as views are validated differently. If you're looking at a video you uploaded, you can monitor your views closely using YouTube Analytics: https://goo.gl/9VxXMN