So I was playing a game with my brother and noticed that my arks with the module that prevents them from being targeted in space battles were getting targeted and destroyed. I worked out that this is because I recently built the system shield improvement on my systems. This set me back multiple turns and 200k dust all because of this bug. I hope it's a bug anyway as this would be terrible game design otherwise. As a counter measure, I have destroyed all my system shields so that my arks avoid getting targeted. I Hope this gets fixed soon.

Can you post a save?