http://news.yahoo.com/pope-franciss-half-miracle-naples-200125119.html:
“Some people say the blood even increases in mass during these displays, though the church does not officially recognise any of the relic’s alleged transformations as a miracle.”
So, it appears the Church has never officially recognized this as a miracle.
I do find it noteworthy though that, with Francis, it “half-liquefied” vs fully liquefied as with Pius IX.
Pope Hot Lips Xll?
Ditto.