We'd like to help, can you let us know if this is happening with specific videos or all videos? Also, share some video URLs so we can look into it. Thanks.
Hmm, 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!