how can i fix the subtitles that are stuck left?

Hi everyone! Anyone knows how to fix subtitles in full screen video from

safari? They keep going left instead of centered. Deleted style,

changed it, turned on and off all overrides and cc/sdh. Nothing changed

but the style. Restarted my device and cleared cache on Safari. I got

iphone 12 pro with ios 17. They are stuck only at that website and are smaller in size even if i put large or xl text.