Help - Nightclub Image Quality Problems?

Hi, I'm not an installer but law enforcement to do with licenced premises in London UK. I been viewing a brand new very expensive IP system with megapixel cameras. I've noticed that frequently, recorded footage in the nightclub shows persons bleached out white as if there are problems with the auto iris. As usual in a nightclub, its a mixture of low light, bright light, strobe and neon etc. The excessive over exposure is in my experience worst than many analogue systems. My question is, is this normal with MP cameras? is there a problem that warrants the contractor returning to look at it? are the settings wrong? The nightclub Manager is in denial as he supervised the work on behalf of owners. But I don't think its satisfactory. What do you think? thanks.

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