play when silent not working when packaged on a mac?

i am having an issue with audio set to play when silent - i have various wavs around a level, they are all meant to stay in sync so i have them all set to play when silent. i do the bulk of unreal work in windows and the audio works as expected in windows in both the editor and in a packaged file. i moved the project over to mac so some apple people could have a preview, and the audio works as expected inside the editor, when does not when packaged. it behaves as if the ‘play when silent’ has been unchecked for everything…is there a setting i am missing, or is this a mac bug?