It only seems to be happening in this forum for me: Chrome 56.0.2924.59 beta (64-bit). It is present when I first come to the forum, but then it disappears on scrolling down. And sometimes re-appears when scrolling back to the top.
Hello, I've noticed a small bug on the home page. When we click on "C#" menu or other menus other than "All" we stay on the "All" page. For example when we click on "C#" menu we are redirected to https://www.codeproject.com/?cat=3/index.aspx but we stay on the "All" page. I've tested it on different browsers and the problem keeps appearing. Kind regards,
They are just selection filters for general questions/articles etc. Not all mobiles are Android devices, and not all Android devices are mobiles. So it just filters items according to how they are tagged by the people who create them.