Season two Blu-ray doesn't have Mandarin?

I looked on Crunchyroll's website for the TGCF Season two Blu-ray set, and it looks like they have English and Japanese, but not Mandarin? Considering that this is a Chinese series, not having voice overs in its original language is a little strange. Not only that, apparently they switched out the original OP and ED to the Japanese versions as well. I've legit never seen this happen before, does anyone know why the decision to exclude the original Mandarin audio was made?