It seems as though the standard and dark work slightly better than light at first but gradually deteriorate. Also just noticing that the items on the menu bar are gathered a bit to the right in dark and standard modes but in light. And going from page to page is what seems to disrupt the display. SF is the only site that this occurs on and this is only on my phone. Not on my iPad. And this has only been in the past few days shortly before my original post about it.