Howdy, I unlocked the checkered deck a while ago and decided to use it today to get the joker for discarding a royal flush hand. Started a normal unseeded run on white stakes and took a few tries before I managed it... and nothing unlocked. Finished out that run, started a new unseeded run and discarded one again but still nothing. I tried resetting my system and then starting a new run: still not unlocked.
I checked through reports and it doesn't seem like using that deck disqualifies that unlock. Am I missing something or is this a bug?