I'm always confused that when I check my Subscriptions tab in @YouTube I don't see all of the actual new videos from the channels I'm subscribed to. If I click on the Home tab at the same time, I will see new videos from those channels? How does this make sense?
Thanks for the info. Could you try clearing the cache and cookies of the browser? Here's how: https://goo.gl/dwzcyo . Also, try uninstalling the app, restarting your device and reinstalling the app. Let us know if that fixes the issue.