Frequency: only once but it should be repeatable
Character name: Y'Lyria Kotori
1. play a mahjong game and complete a closed hand with all runs and a pair of winds or dragons
2. the game will consider this pinfu and not award fu for the pair of winds or dragons despite under all riichi mahjong rule sets that I am aware of this having this awards 2 fu and disqualifies a hand from being pinfu
Screenshot:
https://puu.sh/Djh0y/b5a4d4ed5b.png