The GIRM (Institutio Generalis Missalis Romani) at the beginning of the Missal explains the contents of the Eucharistic Prayer. The First Edition informed us that, in the Epiclesis, "Divine Power" (divinam virtutem) is invoked to change bread and wine into the Lord's Body and Blood. It does not say "the Power of the Holy Spirit", presumably because back in 1969 everybody still remembered that the Roman Canon, Eucharistic Prayer 1, did not contain any reference to the Holy Spirit (until it got to the doxology).
But, in the current Third Edition, the words "Divine Power" are changed to "Power of the Holy Spirit".
All I can think of is that, by 2002, even 'professional' Vatican liturgists had become unfamiliar with the words of the Roman Canon.
There must surely be a better explanation?