I don’t think they care; this route has been broken north to south for over a year now…. And not only this. There seems to be 0 response to anything. These forums are just for us to cope and imagine somebody actually reads them.
Johns post above sounds like a sound fix however it is, certainly not a fix. My first solution to this issue was for me to make my own quick drive and i completely bypassed doncaster; it has no marker whatsoever. The results was still, unable to route me past it. It is something else that is causing it.