Thanks for reaching out. Could be a possible visual glitch. Try clearing your browser's cache & cookies and see if that helps. Also, after deleting the video, does it appear to be reinstated across devices? Let us know.
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!