Holy thread resurrection, Batman!!
It's not the Output envelopes I'm referring to - although they do display the same ASDSR properties, it's the modulation envelopes that I have an issue with.
A quick example of what I mean is if you start from the blank synth template, connect up a square wave from oscillator 1 to the filter 1 input, connect filter 1 output to vca 1 input, raise vca 1 sustain to full, raise filter 1 resonance to about 15. Now connect mod envelope 1 output to filter 1 mod input 1, change mod amount to about 0.35. Set env 1 attack time to about 200ms, env 1 decay time to about the same, release and sustain to lowest possible setting.
When you play a key, you can clearly hear the attack phase of the envelope then a sustain before it decays, if you vary the attack and decay times you will still hear a sustain period which changes in length depending on the settings.
If you compare what happens with the envelope to what happens when you use a triangle lfo set to 1Hz, with the triangle you get a clear up and down with no sustain (if you are only hearing a downward sweep, make sure to set the lfo PWM width to 0.50)- the only trouble is it doesn't seem possible to control the starting phase of the lfo, otherwise I could use this as a workaround.