We'd like to know more. Do you see this across devices? Also, try uninstalling and reinstalling the app to see if it makes a difference. Let us know how it goes.
Appreciate the info. Please send a feedback report directly from YouTube with these steps for us to work on it: 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.