I don’t know if this is a bug or just a typeo, but the rare/yellow “Extended Potions” that I’ve crafted on my Artificer show (2m) as a duration, yet the blue “Powerful” version shows (1h) duration.
They have the same stats other than the duration and I really think the “Extended” is supposed to be (2h) not (2m).
I haven’t been able to try them out yet to see if they actually work for 2 hours or 2 minutes though, because they are soulbound on aquire/craft, level 80 to use, and my artificer is not level 80.