cpu overload voices compensation ?

Hello,

I’m doing trailermusic and there’s a passage that has an action score with alot of EWQL play vst’s playing samples at the end. When I export the piece and it arrives at the complex arrangement it starts cutting off many voices except for omnisphere and a breakbeat loop I inserted there.

When I increase soundcard latency to 12ms , it will only fully export all arrangements (without cutting off the sound of plugins) when I also use real time export.

Is this a bug or a feature, and can it be influenced somehow ?

thx