David,
Thanks for the reply. On one track, there's just a Logic compressor. On the other, 2 EQs, the same compressor, and Space Designer reverb. I will note that they are the same exact vocal, doubled. Just one very low. I don't normally do these but I like the effect, in this case.
I'm looking into the automation but given the track plays perfect half the time (just never during the single bounce I need), that would rule that out, no?