Level 1-2-3 is actually an Osmose flag, yup,

You can hit ignore on the pins. It's true, have a turning circle which one would expect for that to be the end of the way near an another way and that warning pops up. Most of the times there's actually a footway of some kind to continue but if the top (say northbound) of the turning circle e.g. has a guard_rail east west and then a road east west, and that's within 15 meters, the analysers want the assertion that it truly is the end, no foot or other connection that could be used to continue. I look for any path and else put the noexit=yes just on the turning_circle in that case, nothing nefarious as intentionally hiding.