Yep. I firmly believe it has to do with the landing gear; in most videos I've seen of this phenomenon (including mine, below) the destruction occurs right around the time the gear is dropped.
[video=youtube;VcaNNaCZmW8]https://www.youtube.com/watch?v=VcaNNaCZmW8[/video]
This video has you dropping your landing gear at over 260 m/s. Might have something to do with it.
The other ones, you are blasting into port at over 150m/s. I don't know what the gear safe speed is for the Anaconda, but it might be worth thinking about. I'm sure as hell that the gear safe speed for the Type 6 isn't 260m/s.
Try this. Patience.
If I see a video where someone going say 60 m/s and clearly makes it cleanly through the port subsequently blows up, we might have an actual problem here. All I'm seeing is a lot of hot rodding followed by some boom.