Can't destroy inhibitor in Smoulder scenario
After killing the boss in the Smoulder scenario the shield around the inhibitor is removed, but attacks still do no damage. I imprisoned the boss and in one game destroyed him via Blood Money and in another converted him in the Torture Chamber. The camera focused on the inhibitor as if it was dropping the shield again, but still no damage taken.
This is one of the scenarios that was removed from the game as they were produced by our QA Volunteers and thus not technically maintained by ourselves. If you're still playing from the old version which was included in the game its possible this issue was fixed on the workshop: https://steamcommunity.com/sharedfiles/filedetails/?id=1364146100
Note that you can't load save files if the save file was created in the previous version as it will still load the old version of the map. Maybe the cause of your problem.