We'd like to know more. Are your subs reporting that they're not being notified about your uploads? Also, YouTube may temporarily slow down, freeze, or adjust the view count. Explained in detail here: https://goo.gl/fCxaJw . Keep us posted.
Just to confirm, have you made sure you've selected 'Notify subscribers' under advanced settings? Also, could you have your subs check their account and notification settings. Here's how: https://goo.gl/PdDKZW . Keep us posted.