Can't Figure Out How to Remove Cluster Defoliator

[Mysterialize]

Hey there! I'm really enjoying the new DLC so far, but I've run into a point of confusion. This might just be ignorance on my part, but I can't seem to figure out how to demolish the defoliator that dropped with a mech cluster. I cleared the cluster out and the countdown timer stopped, but the defoliator radius keeps spreading and killing off plants. My colonists won't attack the machine, no matter what weapon I use, and there doesn't appear to be any options to interact with the device in any other way. Is there something I'm missing, or is this a bug?
Thanks a bunch!

[harpo99999]

just like a dropped ship module in the older versions , just draft the fighters take them into their attacking range of it and target the ship part then they will shoot it to destruction leaving some resources behind

[Mysterialize]

Oh, it seems like it will only work it I use the attack order specifically. Got rid of it.
Thanks for the help!