Some plugins cause latency because they take more time to process the audio that's coming through them. Mixcraft has delay compensation for effects, so you won't notice any lag most of the time. That said, certain types of tracks in Mixcraft currently don't feature effect delay compensation. These are:
- Output Bus
If you've got plugins that have a lot of latency, try to avoid using them on those types of tracks. Other effect plugins will be just fine, because they don't cause any noticable delay in the audio.
In the case of Submix tracks, the child tracks within the submix do feature effect delay compensation, so you can use the high-latency effects on the intividual submix tracks themselves without any lag.