as I upgraded to 3.7.0, it seems only some files are saved, some are saved with empty id3 taggs. sometimes entire albums, sometimes only single files. the files themself are not broken and can be played.
newest audacious version, everything else up to date, running arch linux.
Try 3.7.1 and see how that works for you, if still having a problem please post a new thread your problem is different to the problems that this thread was about.