In today's puzzle (#170) I guessed 1.Bxe4 Qxd1+ 2.Kxd1 Bxe4 3.Rxe4 as my first guess. 1.Bxe4 was correctly shown as green, but 2...Bxe4 was marked in gray (not yellow), meaning there should not be a second instance in the puzzle of either player playing Bxe4.

However, in the correct solution there ARE two instances of Bxe4 being played, so I believe 2...Bxe4 in my first guess should have been marked yellow, not gray

You're right, thanks for the feedback! Will look into it.