Nope this is something that can't be "fixed".
The VMS4 is designed for optimal sound with the Gain, EQs, and Master set in the middle. With a typical line level source, if you go much higher than that you will get distortion. The idea is if you have a line level source that isn't as beefy there's some headroom to go higher if you need it.
The optimal sound also happens when the VU meter runs close to the 0 mark and if you try to go much higher than the +4 you'll start to hear distortion. If we set up the VMS4 to not even distort at +10 then the VU meters would be useless.
Please next time also comment to relevant posts. I don't know what any of this has to do with audio latency.