Yeah, its not “an issue” but it should be 😉
Point is, to make it work fireflies transcoding script, or whatever means of transcoding to use, would actually have to do resampling. Well, downshifting to 16 bit and 44.1kHz shouldnt be too tough since its an even factor. 😉
Quality will suffer, though.
I guess that’s possible, but then you lose the whole point of having high-quality flac files. 🙂