OK so I found the thread right on the main page!
Silly me for using the search feature!
Attached is a scenario US vs RUS. A pair of Apaches for US and a BDRM platoon for RUS. Fairly wide open terrain. Also attached is a save from right after the bug occured. I tried several times last night and will try several more tonight to get a consistently repeatable bug. No joy. I did get the bug to occur 3 times though. Details follow...
1) Human vs Human Setup
2) Russian Units were never fired or moved by Human player.
3) Bug did occur at 1550m, 1550m, 1600m
4) Bug did not occur in tests beyond 2000m
5) Firing unit was B0 Apache in all tests
6) Best results seemed to be when Apache and a BRDM both saw each other during the turn???
A rough description of the repeats would go like this...
1) Advanced Apache until it sighted a BRDM
2) Pressed End Turn
3) Pressed End Turn for Russian
4) Selected Apache and took a shot
5) Took OpFire from the target before the ATGM launch