I don't know if this is intended, but I doubt it.
If I play a legato instrument, e.g. appasionata cellos, the ADSR envelope works as I set it to, on the first note I play, and on all notes that are not triggering a legato sample. But if I play a C, then jump to G, triggering the interval, the envelope is changed - it gets prolonged. E.g. if I want a semi-slow attack and then immediately wants the sustain to fall to 31, there is a second of delay where the sample is just playing at full volume, before decaying to the sustain volume.
If I play a legato instrument, e.g. appasionata cellos, the ADSR envelope works as I set it to, on the first note I play, and on all notes that are not triggering a legato sample. But if I play a C, then jump to G, triggering the interval, the envelope is changed - it gets prolonged. E.g. if I want a semi-slow attack and then immediately wants the sustain to fall to 31, there is a second of delay where the sample is just playing at full volume, before decaying to the sustain volume.