Man I don't know if we are talking about the same thing.

I have a VST synth (KONTAKT from native instruments). Every time I hit stop / rewind and then play again the VST synth ceases from delivering any sound while it shows MIDI activity passing through to it.....

It feels that every time I stop the song and then play again, it mutes the VST synth for some reason....

Are we talking about the same issue?