Webpack sync is not working

sage
,
4
  1. Are you using new styles that are visible or are you inspecting the selected elements?
    Maybe these styles are applied indeed but simply not visible.
  2. I encountered an issue with similar symptoms, it could be a CORS issue with browser sync.
    Edit: I notice that you added something related to your browser sync config, the cors option mentioned in the discussion I linked to above may do more than adding this particular header.