With the star suit, 30 are cards are used instead of 24 (no 7s & 8s).
So, instead of 5 cards per person, and having to take 3 out of 5 tricks, it is 7 cards per person, and you needed to take 4 out of 7.
If the star suit is trump, there is no other bauer Jack (only 6 trump cards). If any other suit is trump, the Jack of Stars is considered “3rd bauer” (so, 8 trump cards).