It’s not considered a bug, it’s something that’s up to the individual author because, as Nemo pointed out, this isn’t even a felony for RBN standards, so it’s hardly compulsory for customs. Of course anything that makes the gaming experience better is something we look into, that’s why I said that ultimately it’s up to the authors if they want to devote more time to the process to include this.
You are about to leave Rhythm Gaming World and access the external songs DB. While no song or file sold for commercially available videogames is hosted there and only fan generated content is allowed, Rhythm Gaming World has no direct control over the database and no files are hosted here. Alright, we had to made you aware of this, now you can visit the database!