Anti air weapons damage bug

[CDVoidwalker]

When the target is right above any unit and weapon strikes it both the target and units beneath take damage

[GraionDilach]

Never seen this one in AS nor I have heard of such in OpenRA. Need more info.

[GraionDilach]

Forgot to mention here - since my last post, I have seen this more than enough times to consider it confirmed in engine.

Filed OpenRA/OpenRA#14150