From the multiple times this has happened, it appears to be related to attempting to reserve a card in the same slot as the previous pick. It often happens when picking the rare, then selecting the rare in the next pack. I do seem to remember it happening with non-first-slot cards, but haven't been able to figure out a true pattern. Give me repeatable draft access and some time and I'll do my best to figure it out!
Peterr211#91743
From the multiple times this has happened, it appears to be related to attempting to reserve a card in the same slot as the previous pick. It often happens when picking the rare, then selecting the rare in the next pack. I do seem to remember it happening with non-first-slot cards, but haven't been able to figure out a true pattern. Give me repeatable draft access and some time and I'll do my best to figure it out!