Does a Straight Flush have to be played as Straight Flush?

[Octopus Grift]

I got the boss condition that was only one kind of hand can score. I had a flush in my starting hand and I had the spectral card that turns all your cards into a random suit, so I went for flushes. My last hand I thought I had a flush (that would win the round for me) but forgot that Aces were 1s and it was a Straight Flush so it didn't score. Is that how that's supposed to work? Definitely a frustrating loss.

[IsenMike]

The game always chooses the highest hand rank possible, and doesn't give you the option of downgrading. That boss isn't the only place it comes up. If you have Flush or Straight heavily upgraded with planet cards, but no upgrades for Straight Flush, you get the same situation; counting the hand as a Flush or a Straight might score significantly more chips, but it isn't an option with cards that are also a Straight Flush.

As it's consistent across the game, I'd say yeah, that is how it's supposed to work.