We are currently working on resolving the sound cooking issues that some of you have reported where sometimes the modified sounds are not getting cooked and included into the packed mod after running "Save and Publish".
Until then, please be advised to use the Publish → Cook Mod Sounds option to cook the sounds of your mod standalone as an additional step right after using Publish → Save and Publish mod project. Once that's done, head over to your mod's root folder and in the packed directory locate the newly generated soundspc.cache file and copy it manually to <The Witcher 3 Installation Folder>/mods/<your_mod>/content.