Craft All button spent a Rare Wildcard instead of a Mythic Wildcard
I was looking at an old Brawl deck I made with a single uncrafted card, Mythic Rare "Bladecoil Serpent", for the Midweek Magic (MWM) event on Magic the Gathering: Arena. I clicked the "Craft All" button, and got the warning that it would require "1 Mythic Rare Wildcard". I clicked the confirmation button, and went on with my day playing MWM.
Later, while checking my wildcard counts, I noticed my Rare Wildcards had decreased by one, but not my Mythic Rare Wildcards. I noticed this because I was counting them so I could determine whether I had enough to both craft 4 Rares currently on Arena as well as cards from the upcoming Wilds of Eldraine set; I remember having 19 Rares and 8 Mythics.
Now, I still want to keep Bladecoil Serpent, the issue is that it appeared to use a Rare Wildcard on a Mythic Rare craft.