Sorry for the late answer.
I have too this problem since one week.
In fact, when I put my S.L.AM.dunk in a certain pose, it does not work.
However, when I move a bit my S.L.AM.dunk (10 cm), it starts working.
I have no clue why.
If it does not help you, you can maybe check the 2 topics
which are more recent.
there are no working answer yet but there may be one one day