This has happened to me for so long, but I haven't seen anyone else mention it so I'm sure the problem is on my end. But just in case, most of the time on mobile the arrows for changing the page (at the bottom of a thread) don't show up. I know where they are supposed to be so it's not really a problem unless I accidentally click the skip to the end button instead of the skip one page button...but it seems like a weird issue to keep having.

Me 2