New to SH3 & Convoy AI

[BJ]

After long experience with SH2, just got SH3.

Really blown away by how good it is. But it appears SH2 and AH3 share a common problem: Convoy AI.
Using stock SH3, ver 1.4:
Conducted an attack on an escorted convoy off Florida.
Fired 3 eels, 1 at a cargo ship, 2 at the closest DD. One dud, 2 misses. All escorts come looking for me. I sneak away. After about 20 minutes, come to periscope depth. Observe convoy.
Planes have appeared. 1 DD and 4 planes depth charging where I was.
2 more escorts are firing at one another. As I watch, two tankers collide. One more escort rams a cargo ship and sinks. Then 2 of the planes collide, then the other two. In a few minutes, the convoy is decimated.
The only difference between this behavior and SH@ is that in SH3 I did not receive credit for any of these kills.
This was very disappointing.
I've searched the forums, but couldn't find any relevant hits using terms like Convoy AI, etc.
Anybody else seen this behavior, and is there a fix?
Thanks