Website Viewing Not Fixed on Selected Measure

I've had this problem with viewing any score from any uploader that's multiple pages. When the playback auto-scrolls through the score in full screen mode, the view is not fixed on the playing measure, rather it seems the fixed place is to the left of the screen border.

Visually, when I'm viewing a score in full screen, the red bar highlighting the currently-playing measure will continue offscreen to the right under the score auto-scrolls, at which point the selected measure is now offscreen to the left and I have to wait for it to come back into view. Manually scrolling to the selected measure doesn't work because as soon as the next bar is entered, it reverts back to its offscreen position.