Please remember that when you change a Patch parameter (which includes Effects), you’re editing a Patch, not a Part. Different Parts can be based on the same Patch. If you have the same Patch loaded into another Part or Parts, the change will be heard immediately on all Parts that are configured to use that Patch.
If you don’t want this to happen, please make a copy of the Patch before you change it and load it into the Parts that should use the original Patch.