Sift isn't working properly [Investigating]

   While i was playing with sift in Avacyn 's Madness, i noticed that it doesn't work properly anymore.

  Instead of picking 3 cards as usual, the card followed the following pattern every time :
- the first iteration works properly.
- the second iteration misses when you select the card. (No new card is added to the hand but a 'discard' animation displays when the third fetch is launched).
- the third iteration works properly (and displays the exact 3 same cards as the 2nd iteration).
  
Has anyone playing sift noticed some weird behaviour? 

//Edited Title - Tombstone