I found two issues with the ADSR Envelope controls:
I had a regular ADSR setup and because I liked the visual feedback of the graphic I used the ADSR Envelope control for every stage, so 4 separate controls. Each had a different CC assigned ofcourse. When turning the knobs the graphic updated (on all 4 controls) when I used the Decay, Sustain and Relaease, but not the Attack. For the Attack only the Attack graphic was updated.
I had a second set of ADSR Envelope controls set up to control a second Env. This set used completely different CC’s and was on another page of the preset. However, mapping the plugin (Arturia Jun-V6) could not be done. Whenever I MIDI-learned the control for the 2nd Env, the same stage on the first Env became unmapped again. When I changed all the controls for both sets of ADSR controls to regular faders the issue was solved.
I’m not quite sure how the E1 “groups” the different stages of the ADSR controls when using the ADSR Envelope control so that they are 1 Envelope controller? It could be useful to have a separate grouping parameter for that.