It didn't happen before upgrading to iOS 17. I can't find any posts about this yet so I post this one. On any browser(Safari, Chrome, Edge, ...), you activate the fullscreen mode of the video. And with dev console, or you add the event listener to "play" event, you run video.load() 2+ times. Then the size of the video is not as fullscreen. You can see this on Twitch because they use video.load() on their live streaming service so that they show the live moment of contents to users every time users hit the play button. When I pinch to zoom in or out or deactivate fullscreen mode, it gets back to fullscreen size. Has anyone experienced the same thing??