For the screenshot below (and attached save game), EU forces detect an ATGM launch at a third party, but determine it is hostile. A moment later, the launching platform (a neutral Mi-35) is detected and then fired upon as a hostile - even though it committed no hostile act against the EU (or an EU-allied) force. The Mi-35 was never visibly determined to be hostile - and it was colored green when it was engaged (when it ought to have been red if declared hostile).
In an earlier play-through, I had an unfriendly ZSU fire at my AH-1Zs. I don't know why they fired at me - I hadn't done anything hostile to anyone at that point, I just overflew the ZSUs on a recon - but the ZSUs also weren't marked as hostile, even after firing on me.
Lots of strange little ROE things going on in scenarios with multiple sides and with no collective responsibility.
