How would you suggest to solve this?
This kind of terrain is especially tricky given it’s more weather sensitive. Even if you look at Google Maps which is generally deemed to be better in this part of the world there are some rough patches with various issues.
Either you spend extra resources on trying to get better data, which I would assume is rather expensive or difficult to use in a commercial product, depending on the source…or you try to correct areas by hand which is not only very time consuming but also difficult to get right.
Not saying it’s impossible and we might get better data down the line from Bing, but I don’t think it’s very likely to spend special resources on this.
Your best hope is to wait and hope for updated Bing data.