In 1841, Congress enacted a federal bankruptcy statute. The implementation of this statute was problematic and Congress repealed it two years later. Before that, though, Congress asked all federal judges for written comments on how the law could be improved. This was an unusual request, but even more unusual was that six Justices (including Chief Justice Taney) provided comments.
You can imagine something similar happening today on a technical subject, though without the participation of any Justices. But I doubt Congress would make such a request or that judges would answer that call.