I opened both the RND and SCR campaign files in Mission Editor and tried to see if I could pinpoint anything going on in the spot where the AN34 lag is happening. Nothing in the SCR file but here's a screenshot from that sector in the RND file:
The arrow points to a spot which is obviously something and it's right where all my freezes and lags are happening. I ran the simulation and there is nothing moving along that line in that area until after 3 Sept 1939 after which something does start moving along there every 2-3 days.
With all my careers, I have only passed out through that area after the war starts on the third patrol. The first patrol always starts on 1 Aug, the second in late August sometime, and then I come home and only on the third patrol would I be passing through there after whatever it is also starts moving along that line. I think this is the reason why I can get through two patrols with no problem (other than maybe a slight lag) but then freeze up and crash on the third one.
Problem is, I have no idea what it is that's passing through there, other than a green dot with a "?" in it. And I don't know how to find out, or what to do about it causing the kind of problem I'm having.
So, uh, help?