Hey there @syzygymusic
You can check & adjust the end points in your curve on LFO Tools as well as using the Smooth setting to fine adjust the filter and avoid clipping. On the pic you can see the default parameter and that the end filter curve point is rather sharp as opposed to be more rounded in the second instance + add some "smooth" value if needed.
Hope that helps !
NB: Check this post on the forums to see the picture