Prodigy release trouble

Hi,

I have an old ( first model ) moog prodigy with trouble. All is OK except the release in the in the loudness contour.
White switch release in position ON and Glide to zero, when I release a key, the tune is not keep with original tune, it goes down .

If I positioning glide to 5 it seem the trouble disappears. If any body have an idea, I have schematic and service manual.
Thanks a lot.

Hmmm…don’t think you’re care’n … about this very unique problem:

https://forum.moogmusic.com/viewtopic.php?f=1&t=33070