Retriever Sentinal

I was playing a skirmish game as Anders just now and noticed something about the retriever sentinal. Not only was it expensive… 1800 each resource. But I noticed while I had it flying around the map it stopped using its beam attack on units and buildings, and would only shoot its cannon. Which is bad because the beams are the only thing putting out decent dp. I also noticed that it took multiply attempts pressing Y for it to use it’s ability, despite it being the only unit I selected.

Has anyone else come around problems with the retriever sentinal not working properly? Or was it a fluke? I haven’t had a chance to play a multiplayer or another game as Anders yet, but am curious to know if anyone else has had any problems.