It's work like that which well prove who deserves the Bug Hunter job or not. Thalas, good work. I'll see if I can test the bug myself.
I tried testing the same situation you stated RavingRabbid, to see what would happen. I clicked on Golden Hourglass and as I was drawing a card clicked on (unupgraded) Mindgate, before the drawn card could reach my hand. It just told me the typical message something along the lines of: You have 8 cards or are already drawing a card.
No such glitching occurred for me. I'd say that this bug is unconfirmed or not a bug.
Maybe it has something to do with if at least one of the cards is upgraded or not?