It's very common for programs to assign links to the nav bar that ultimately redirect to other pages. For example, /learn and /teach always redirect to /learn/index.html and /teach/index.html, respectively. The nav bar in many themes is designed to highlight the "selected" nav link, but this is broken if the ultimate URL does not match the URL listed for a nav bar item. See here for an example: https://dev5.learningu.org/teach/Splash/index.html (the "Euro Splash" link was clicked to get to this page).
Note: I only observed this with bigpicture, but this may be (and probably is) an issue with other themes
It's very common for programs to assign links to the nav bar that ultimately redirect to other pages. For example, /learn and /teach always redirect to /learn/index.html and /teach/index.html, respectively. The nav bar in many themes is designed to highlight the "selected" nav link, but this is broken if the ultimate URL does not match the URL listed for a nav bar item. See here for an example: https://dev5.learningu.org/teach/Splash/index.html (the "Euro Splash" link was clicked to get to this page).
Note: I only observed this with bigpicture, but this may be (and probably is) an issue with other themes