This happened in the game before with Vampires and Devourers, I'm not sure why. Maybe the Vamps were healing? I didn't get a screenshot.
Anyway, if Empathic Bond is in play, a gravity pulled Voodoo doll no longer does damage to the opponent (which makes it pretty worthless). I don't imagine this is intended. Screenshot below.
EDIT: Just saw QuantumT's post. Regardless, screenshot below confirms the Empathic Bond issue.
With how bugged they are, I honestly wish Voodoo Dolls would just be removed from the game Immediately and added again at a later date. Or, to preserve people's upgraded cards if that were an issue, I wish it were just switched to a null card that did nothing so people wouldn't use it, until it is fixed. Right now, it's almost useless.
(
http://imageplay.net/view/m7Gbd109923/voodoo)
Second EDIT: This is not a PVP issue, the Empathic Bond. It happens in AI battles as well.