Calf Filter Plugin Sweeps Automatically

If you add a Calf Filter to an instrument or channel while the engine is running, or on it's first play after it's added, or on export, the cut off seems to sweep briefly. I have one project where it didn't do this (I think), but in all my subsequent tests it does it.

Reproduce the Calf Filter behavior when adding it to an instrument or channel while the engine is running, on its first play, and during export. Compare the cutoff behavior across these cases and verify that the cutoff no longer sweeps briefly in the affected scenarios.

Written by the indexing model from the issue text.