Sounds like a voltage offset issue. A 4hp WMD/SSF SPO can fix it, or Maths, Manhattan MVP, etc.
I noticed several cheaper Eurorack VCAs that would click regardless of the envelope times. Some VCOs were worse than others in those VCAs. The voltage offset generator saved the day.
Might be related to a phase issue as well. Are you still using an ES-8?
Great tips @stschoen (and amazing patches!) Come to think of it, Maths can be used as a slew generator as well.
Edit: Ahhh, sorry still new to Audulus and this forum. Apologies for recommended hadrware when the tools needed are in the app. D’Oh!