Board Thread:Off-Topic Discussion/@comment-35301431-20170314133630/@comment-53539-20171207183822

The English vocaloid companies once dropped a note that Yamaha is often the set back for them. They send the vocal to them for testing before release, its thrown back if there is an issue. They toss it back to Yamaha after fixing it. The circle goes on until Yamaha is happy and the company can release it.

From that moment onwards there is no restriction on when the vocal can be released.

This is why the English vocaloids come out of nowhere. :-/

I don't think the English vocaloids are the only ones suffering with this problem at all.