Hi - I know I am not representative of all people and situations. It is my experience and a suggestion that I have observed people doing this and usually they have too much air in the wing. Again, it might not apply to all people. Almost all of my diving is vacation diving where I am using an AL80. At 300-500PSI of air, I don't have this issue...For local diving, I use a HP100 but that diving is so few, so far between my vacation dives. I think your assessment makes sense. I am a single tank, recreational diver, and have never dived doubles. But as you say about weights, I am also not over-weighted. As for slightly too much lead on belt or integrated weights or distribution...That sounds like "user error" doesn't it?
It took me a while into my diving to dial in my weights and distribution for each situation (exposure, tank, etc.) so that is understandable. (I don't mean that in a snarky way - it is the internet and I don't want you to misunderstand or take my sentence out of context.)