tactics puzzle should be stopped one move earlier

this puzzle should be stopped one move earlier

lichess.org/training/1186

The cross-pin tactic can be spotted, but the final decision of Bx or Qx seems arbitrary and is not the point of the tactic, but the player can be failed for his choice here.

Well, taking with the queen exchanges Q when its not really necessary. Quick engine analysis gives +2 more points to taking with the B vs the Q.

That being said, I agree it's not the point of the tactic, but I think the algorithm used to create these tactics says "hey there are significant points to be won or lost here so keep going"

'Quick engine analysis'... Yes, exactly, it's very hard to see the difference between +9 and +7 in this puzzle with the last move without using an engine. Humans will look at and say both are good.