Has anyone else had issues lately with changing thumbnails? Mine have been taking an extremely long time to update and some of them aren't even changing. Got a fix for this @TeamYouTube?
Appreciate you trying the steps. 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!