Gotcha. Interesting! Would Roman Catholics characterize it as a change? Or as an explicit recognition of what it was all along? In other words, it’s not really conceivable that someone claims that the supply *always has been* 84M, but to my new ears to this topic it seems conceivable that they say the Filoque heresy actually isn’t heresy and isn’t new either, and is rather the truth as understood by the Apostles etc.
Discussion
Feel free to verify what I’ve already stated. The Filioque came way later, and was rejected by many in the historic church as a Trinitarian heresy.
If you want to do a deep dive, read St. Gregory Palamas’ Apodictic Treatise on the Procession of the Holy Spirit
Roman Catholics say the creed both ways. The majority of RCs include the filioque, but the "Eastern Rite" Catholics say it the way the Orthodox do.
So, Catholics have a funny workaround for this sort of thing.
"Even if they don't say it, they still have to believe it."
If you push on that argument, it inevitably falls on its face.
Would recommend listening to this guy's journey which included time as a Roman Catholic before gliding into the Orthodox Church.