Dark Brotherhood - Alain DuFont - enemies not attacking

[Eryneth]

Hi All,

I'm having yet another issue of enemies not attacking but i seem to have narrowed it down.

I've started the "Mourning never comes" DB quest and all goes well (enemies attacking me) up until i get to the point i need to kill Alain DuFont.

He makes his little pre-death speech and then unsheaths his weapon to only then just resheath it and stand around.

Shooting him with an arrow drops him straight away but the other bandits in the room i can't seem to do any damage to.

I shoot them in a face and they react and pull our their weapon only to also resheath it and their health auto restores.

Going anywhere else in skyrim all enemies are now passive.

My thought is that when he's yapping away skyrim does *something* that prevents the bandits he's with from attacking till he's done, the issue being
that whatever it does isn't removed.

Anyone have ideas on that?

If it comes to it im just going to "prid 000d2aff" and kill him from the console before i get to the room and see if that fixes it.