Why not blame Apple for having a busted-ass menu bar design? The behavior of "if the menu is busy, icons just disappear" and advice like "apps shouldn't rely on menu bar icons" are just bad ideas. They don't work well with how people use computers or how developers write apps. It's a bad design.
I prefer to blame Rider because it's the only app where I encounter this problem, and it seems more like a "don't make your list of menu entries so long it spans the notch and pokes into the menu icons" error than anything else to me. Simple as.