That's definitely odd behavior. Does this happen across devices? If you're using a browser, try clearing cache and cookies. If you're using the app, try deleting the app, restarting your device and reinstalling the app. Let us know if that helps fix the issue.
Appreciate the info. 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 back, we do review everything and use the details to investigate and fix issues. Thanks!