[GS] [1.0.0.341] Neutral AI's battleship provides AA cover for adjacent barbarian unit against player

[MrRadar]

I attacked a barbarian unit in camp with my biplane and nearby battleship of a neutral AI (at peace with me) provided AA cover for the barbarian unit, shooting at my biplane.

No mods whatsoever.

A screenshot and a save file provided in this post.

 

[Victoria]

I can confirm I have had this also.