This has happened for over 6 months and I figured they would fix it (because I am a dumb ass).
Cannot select any specific category on mobile. This is not the individual categories page, but the “categories” collapsible list with the “+” next to it. (you get to this by clicking the “3 lines” icon at the upper right of the site in the black bar). The site denies your request and brings you back to the page you were on before you hit the “3 lines” icon...
A: Because it messes up the order in which people normally read text.
Q: Why is top-posting such a bad thing?
Q: What is the most annoying thing on forums?