Defender's Block Bug?

I was just in a situation where i think defender's block should have triggered but it didn't. The priest who had it was standing 3 squares away, from the target, facing towards the source, but had line of sight on neither the attacker nor the target. As far as i know, that should not matter, but i can't explain why the block didn't even get a roll.

Code:

BATTLE LOG: Player=Mutak,Scenario=MP Gladius Single,Room=Mutak vs fizbann,RoomID=33613,Event=PlayAction,Action=Shuffle, Team!,Instigator=Lum,Targets=
startTimer 1 1124
BATTLE LOG: Scenario=MP Gladius Single,Room=Mutak vs fizbann,RoomID=33613,Player=Mutak,Actor=Ordin,Event=Move,Origin=(6, 6),StartFacing=(0, 1),Destination=(7, 7),EndFacing=(0, 1)
stopTimer 1 1121
startTimer 1 1121
BATTLE LOG: Scenario=MP Gladius Single,Room=Mutak vs fizbann,RoomID=33613,Player=Mutak,Actor=Asha,Event=Move,Origin=(5, 3),StartFacing=(0, 1),Destination=(5, 3),EndFacing=(0, 1)
stopTimer 1 1117
startTimer 0 1144
BATTLE LOG: Scenario=MP Gladius Single,Room=Mutak vs fizbann,RoomID=33613,Msg=The active player is now fizbann
stopTimer 0 1139
BATTLE LOG: Player=fizbann,Scenario=MP Gladius Single,Room=Mutak vs fizbann,RoomID=33613,Event=PlayAction,Action=Winds of War,Instigator=Tineva,Targets=Borsmith,Ordin
startTimer 0 1139
BATTLE LOG: Player=fizbann,Scenario=MP Gladius Single,Room=Mutak vs fizbann,RoomID=33613,Event=TriggerSucceed,Trigger=,TriggeringActor=Borsmith,AffectedActors=,TriggerType=PreDamage,TriggerLocation=Hand
BATTLE LOG: Scenario=MP Gladius Single,Room=Mutak vs fizbann,RoomID=33613,Msg=Borsmith took 0 damage
BATTLE LOG: Scenario=MP Gladius Single,Room=Mutak vs fizbann,RoomID=33613,Msg=Ordin took 1 damage
stopTimer 0 1135
startTimer 0 1135
BATTLE LOG: Scenario=MP Gladius Single,Room=Mutak vs fizbann,RoomID=33613,Player=fizbann,Actor=Borsmith,Event=Move,Origin=(8, 13),StartFacing=(-1, 0),Destination=(7, 10),EndFacing=(-1, 0)
stopTimer 0 1134
startTimer 1 1117
BATTLE LOG: Scenario=MP Gladius Single,Room=Mutak vs fizbann,RoomID=33613,Player=fizbann,Actor=Ordin,Event=Move,Origin=(7, 7),StartFacing=(0, 1),Destination=(6, 6),EndFacing=(0, 1)
BATTLE LOG: Scenario=MP Gladius Single,Room=Mutak vs fizbann,RoomID=33613,Msg=The active player is now Mutak

 

Was the target facing the attacker? If not, then "Can't Block" really means that.

 

Both the target and the priest were facing the attacker, but since the target wasn't the one doing the blocking (the priest had the block) it shouldn't matter what direction he was facing.

 

Blocking by default requires LOS to instigator so defender's block doesn't trigger if it cannot see the attacker. Just being 3 squares of the target isn't enough. Somewhat of a tricky card to use.

 

I thought i'd used it in similar situations before without a problem - are you sure about that?It's a card i have used a lot.