This might not be related but as of yesterday (I think), on an iPhone I’m not able to scroll to the bottom of the page completely. The bottom breadcrumb is no longer accessible.
This example is from this page as I was working on the post and scrolled down. It is showing 2 ads but no bottom breadcrumb. As I was scrolling you can see arrows. The up/down ones in the right are accessible but the left-facing arrow on the left side is low and obscured.
Another example of where can’t reach bottom of page. So to access the breadcrumb need to scroll to the top of the page.