Under the new beta I'm unable to modulate distortion intensity with either envelope. Can someone confirm?
I think you need to use an LFO to modulate the distortion intensity.
IIRC, envelopes are per voice whereas LFOs are per part.
Distortion is also per part so can't be modulated by a per voice source.
If you set an LFO to saw and enable Env Mode you should be good to go.