This bug can be also (if RNG helps) be used in our favour apparently. In my last game I used a Priestess of Freya to bring another Priestess of Freya. The resurrected card ended up in my opponent's part of the board (obviously...) but I could use the ability of that Priestess to bring back a card from his graveyard (he was playing monsters and the Foglet I chose ended up in MY part of the board). So it's a really strange bug.