I use Safari and MacOS version 10.14.6
Recently I am facing a problem when playing youtube videos in full screen mode.
Earlier when a video is running in full screen mode, I could use the controls on the video player to drag and fast forward the video.
Now when I make the video full screen it plays but it doesn't react to move movement. So I cannot change the volume or cannot use the slider to jump to a position in the video.
The only way to do this is to switch out of full screen mode of video.
This problem started only after a recent update.