Could you try to install "TeamVIewer9.msi", using "Managed Delivery" policy for single client computer, where Quick Delivery task doesn't install it? This will be just for test and research of why it fails to download it and what Package Server sources are offered to use for download.
When "Managed Delivery" policy will arrive to this client, then you will be able to open properties of delivered "teamviewer9.msi" to see details, about from where it tries to download it and why download fails