Close Assault vs Amphibious Vehicles

[Killbasa]

One more thing I noticed after testing some more: if the unit is set to computer control then they will attempt a close assault on the amphibian unit classes under circumstances when a human player cannot. I'm attaching two more save files, both consisting of a Japanese platoon surrounding a Marine Corps LVT A(1). The first file has the platoon under player control. No matter how many times I try they will not attempt a close assault when I attack the LVT. The second file is the same situation, with the only change being this time the Japanese platoon is under computer control. Don't perform any actions, just end the turn. Once you do this you should see the squads attempting close assaults. Any ideas on why the computer can do this but the human player cannot?