I have noticed this a few days ago, but maybe it was there longer, maybe it appeared after the recent update a week or two ago.
When i open a post on mobile (Chrome, Android), i can scroll it by swiping anywhere. Except for the blue block showing number of posts (e.g. 14/14). If i swipe right at this block, nothing happens. If often is right beneath my thumb when i open a post on my phone holding it in my right hand. I even thought this is some performance issue until i figured this out. A bit annoying. I can scroll by swiping any other clickable element like buttons/links.