Hi Timo,
AHDSR modulators will always return to their “base” value upon release if the property being modulated is not volume. Volume is a special case where it will start and finish at -oodB.
If you wish to pitch down at stopping the best way to do this is to create a parameter and automate the pitch of the event here so that the maximum value is the root pitch and the minimum value of the parameter is where you want the pitch to finish at.
Add an AHDSR to the parameter and set the Initial, Peak, and Sustain to 100%. Adjust the release time to what you need. Keep in mind that the AHDSR modulator depends on the event’s time, which is being affected by the pitch adjustments, so you may need to tweak the release time.
Thanks,
Richard