Confusing error message when relations use a way under construction

[bxl-forever]

If a bus route has a way tagged as "highway=construction", this flags a warning. Fine!

But the report about the route gives this warning instead: "Street vehicle route over railways = true"

The situation also arises for rail routes, should someone change one of the ways into railway=construction. It is still considered as a railway but the report will say "Railway route over roads = true".