Historically Mahjong 4 Friends has randomly failed to recognize a small percentage of Marvelous Mah Jongg card hands that use both "any" value and "any" suit tiles. This affected most (all?) MMJ card years, and has now been fixed. Some performance optimizations had to be removed as part of this change.
What this means for you:
Overrides may be removed in the future for MMJ cards as well if these changes are successful in eliminating all incidences of incorrectly denied Mahjong declarations.
That's all for now! As always, if you have questions or suggestions, please send me an email at support@mahjong4friends.com