Happy to help 
Apologies for missing that question earlier. I have set up a test Studio project, trying to replicate the one in the UE project you shared previously. I am unfortunately, unable to reproduce the issue. Would it be possible to grab a screenshot of the channel mixes on your event that is sending it’s audio to SL?
Would it be possible to connect to live update (FMOD Studio | Editing During Live Update - Initializing Live Update In The Fmod For Unreal Engine Integration) and record a profiling session: FMOD Studio | Profiling and package it with the following settings:
Let me know if you have any issues with live update or profiling.