Thanks for the info. Could you try clearing the browser's cache & cookies while on the desktop and uninstall/update the app while using the mobile device to see if that fixes the issue? Keep us posted!
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, we do review everything and use the details to investigate and fix issues. Thanks!