Mission Architect: Dialog problem with NPCs guarding a destructible object

[Electricboots]

(I attached a picture to help)

Basically the guards around a destructible object repeat the dialog twice. Expected behavior should be that each line dialog (Guards Unaware and Enemy Attack) should only be said once...

[Electricboots]

On Brainstorm the same test mission doesn't have the problem shown above on the live server...

[Electricboots]

Just tested this in an arc that I have published a while ago (my other tests were on non-published arcs). I'm sure it was fine before but now it has the bug also.