Hello I am having this same issue, but in my case, I cannot find a theme that will work to display the navigation. AS the OP put it, nothing seems to help. True to what the OP said, going to the legacy options in settings causes the navigation to display. I am running very similar to what the OP has running as well, but I have disabled all of the plugins, to see if that was the issue. I have now gone through about 40 themes trying to find a solution.
Hello there, I am having this same issue it happens on groups, friends, members, etc. I can produce the same results as you. If I go to legacy, there is no issue. I have tried about 20 themes that are compatible with BuddyPress and it produces the same result. I too thought maybe it was a plugin and disabled everything, and nothing seemed to help. I also tried to flip the side bar, go without a sidebar, and it just does not change.
