wwcom

I have been playing the Nurnberg for a couple of days now, but where I have so far been able to regularly dispose of Clevelands and the likes relatively consistently, since yesterday, I keep getting blown up with what appears to be single shell hits from everything but DD's. Never a detonation though. The difference between yesterday and the day before is noticable; is anyone experiencing the same? It's really weird and annoying to go from 95% health to a bubbling wreck and knowing you were only hit by a CV. Never mind a BB. No matter where it hits, even a hit on the tip of the bow or stern, I'm instantly gone. Anybody knows what causes this? Any help is appreciated.