We'd like to help. Could you try signing out of your account & signing back in? Also, try switching networks from Wi-Fi to cellular and vice versa to see if that makes a difference. Let us know.
Hmm, please send a feedback report directly from YouTube with these steps: https://goo.gl/WdI0BK . While every individual report may not get a direct response, we do review everything and use the details to investigate and fix issues. Thanks!