I am still getting a crash on PS4. I'm able to replicate it at will.
On the map with the huge broken chemical 'drums', if a gang member moves into the Ambush/Overwatch space of multiple enemies whilst on the ground floor, the game crashes.
Besides the AI randomly choosing not to make the same move after re-loading the mission, the only way out of this crash seems to be to force a forfeit of the current mission, via deleting the mission save file. This seems to cause the game to assume you forfeited, but (luckily) does not apply any equipment loss or injury penalties.