Yeah sorry, I probably could have explained it a little better I guess haha!
I made a bug report about it: Stone of Jordan can snapshot temporary elemental bonuses - #7 by Iria-1342
The basic idea is that, normally, the new SoJ effect doesn’t work with temporary elemental damage buffs like Black Hole: Absolute Zero.
However, if you potion while the cold buff from Black Hole: Absolute Zero is active, it applies the SoJ effect, and raises your fire/lightning/arcane up to match your temporary cold buff. Your cold damage will drop back down when the Absolute Zero buff falls off, but your fire/lightning/arcane damage will stay elevated. And they will stay that way until you potion again, change floors, or die.
Potion snapshotting is an awful mechanic, and I’m really hoping they fix this.