Found another couple of odd things: firstly, in the character info section, Tammy's card is completely blank. Or at least, it can appear blank, not sure if it's just on my end. Second, when taking the "meditation" card as your reward at the end of a floor, it will sometimes hurt you instead of heal you. Had it happen while playing as Pi with Zac as supporter in the forest dungeon, in case that helps narrow anything down. I suspect it happens when you take it while already at full health. Edit: found one more thing, the YCH supporter, intended to be unlocked by beating haunted mansion using Ziul, was unlocked for me just by selecting Ziul while on the screen to go into the haunted mansion, so, it gave it to me for free without ever setting foot inside.