We are aware of this bug, as soon as Thomy comes back from his holiday I am going to make him aware of it so it can be fixed.

roger that.

Any more information on the issue? I've just tried fighting a corporeal beast with 2 accounts and it worked flawlessly.

thomy if u solo it u can kill it and there is no bug, but if there is more than 2 players attacking it, when the corp moves to attack someone the other players cant attack it unless all players stand in front of it .
i attack corp almost everyday at least 10 times and always happens to me.
try to fix it please cuz it lower's the chance of some players to get the drop