Youtube changes the dislikes on Joe Bidens video

I was just watching a strange youtube video of Joe Biden delivering remarks to the National Institutes of Health Staff, and even though he was not very close to anyone, he did the whole video while wearing a mask. When I looked at the ratings on his video It had 2.5k dislikes, but when I re-loaded the same video in a new tab it only had 659 dislikes as seen in this video.