Come UP to crush depth?

[DeepSix]

I found this a little odd; maybe there's a reason behind it, maybe it's just one of those things....

I got two hits on a Shokaku but with a DD literally right on me. My fish probably went out under his depth charges. As expected, I started taking damage - some to the pressure hull. Despite that, Sargo was able to hold depth at 200 feet, at least at first. I have no idea why the game always requires that it take longer to repair the flooding than it takes to completely flood the compartment, but no matter who you put on repair duty, it does. You can never get it repaired before it completely floods.

Anyway, while I was dithering with that, I suddenly noticed the depth gauge dropping rapidly. We were already well below crush depth. At 500 feet (2x Test Depth), I ordered blow ballast and, miraculously, Sargo started coming up - very rapidly. 490, 476, 455, etc.

Now the strange (to me) part. At around 275 feet or so, I suddenly start taking more damage. It wasn't from any depth charges, though. Just spontaneous destruction. Radar destroyed, compressor destroyed, man down, etc. Before I can do anything else, I'm dead. In the "flyaway" cutscene, I caught a glimpse of the boat. It had an up angle of about 50 degrees. Way more, of course, than normal, but then of course the boat was heavily damaged.

Running quite a few mods but they're all either graphics or sound related, except for the Natural Sinking Mechanics mod.

Anybody else run into this that can make it make sense? Why did I have to come up to get crushed? After the initial depth charge damage, there were no more DC hits. Is it mod-related or what? Just curious; I never ran into this before.