Hey AOTR Team. Your favorite AOTR user, BubberDuck here.
I wanted to report a bug I noticed while playing as Mordor against Gondor. I could not use my Attack Trolls or Shelob to attack the Gondor AI's Dol Amroth Citadel. They simply clip into it, and will not attack. However, if there are troops nearby, and the trolls/shelob hit them, the Dol Amroth Citadel does register damage. I have not tested this with other trolls/larger units, such as mountain trolls or drummer trolls, but I suspect the same result.
Map: The Black Gate (2v2)
Faction Played: Mordor
There is a replay I provided that displays this, but it's about 39 minutes in. If you are okay with waiting that long, take a peak at it.