I won't comment on whether it's a solved problem in general, as I don't actively follow the area very closely, but that particular QRNG has been shown to be mor

I won't comment on whether it's a solved problem in general, as I don't actively follow the area very closely, but that particular QRNG has been shown to be more biased than /dev/urandom [0], and other QRNGs have exhibited similar issues. [0]: https://www.researchgate.net/publication/328738331 https://www.researchgate.net/publication/328738331