Muting or fading out instrument parts without affecting effects on that channel, in Garage Band.

I asked this in the Garage Band forum but someone suggested I ask in the Logic forum as well.

Working in Garage Band 10.4.11. I have a guitar track that has reverb and delay on it, but I need to mute portions of that instrument (fade out the region ends to eliminate pops, etc.), without affecting the effects on that channel. Using the automation to lower the level of the guitar part also lowers the level of the effects that are happening. Is there a way to do this? Thanks.