I played a flush consisting of the following cards:
6, A, A, A, A (all spades).
However, the game interpreted my move as attempting to make four pairs, so it didn’t count the 6. I was actually using The Idol (set to the 6 of spades) and a Hanging Chad (joker), which should have completed my flush. With a proper flush, I would have received a significantly better score, so this error caused me to lose the game. I believe the game should calculate all possible combinations and select the one that yields the highest score.
Balatro Wiki
The Idol is a Joker that provides x2 Mult when a card with a chosen rank and suit is scored. For example, the card may be an Ace of Spades, or 7 of Diamonds. The chosen card is decided at the end...