Yep, the $12.50 ask appeared on my Fidelity Active Trader at that time. Looked real enough that I thought the dam might be about to burst, but then it disappeared after only a few seconds, and the market closed a few more seconds later.
I saw it (on Fidelity) towards the end of the trading day...It looked to me that there was a few seconds where the shorts had no offers...It's an indication of what will happen once approval hits. IMO.