I've logged in and had a problem when going back to play the NPC 'Maisenta' at Triple Triad, in that the option to play her when selecting her is no longer available. Hence I can't play her now to get the card drops I need from her.

Other NPCs throughout the region seem to work fine for me. I had played Maisenta before now and had no issues. She is one of the 'can play anytime' characters.