Oh, sorry, I must have misread your changes. I do not understand why I came to the conclusion that you did actively edit Bus 101.
The problem is a little bigger as any object which was modified in the last few minutes might be lacking synchronization on Overpass. Uploading should lead to conflicts and I am not sure if these conflicts can be solved automatically. Downloading from the OSM Api instead of Overpass will smaller the amount of possible conflicts but still conflicts on upload are possible. On the other hand, I doubt that inexperienced users (using osm-relatify instead of JOSM) will be good in solving conflicts manually.
Maybe, @NorthCrab can tell us more, how these conflicts are currently handled (solved) and what thoughts he has for further improvements.