High Quality Gaussian DoF not working on iOS Metal

The High Quality Gaussian DoF does not work when deployed to an iOS device that supports Metal.

After enabling the setting within Project Settings to support Metal (A8 chipsets) and above, and then enabling HQ DoF within the Post Process Volume the DoF does not display as expected when deployed to an iOS device.

1. Download and Open attached project.
2. Package for iOS
3. Deploy to Metal device with A8 or above chipset.

Outcome No DoF is rendered on the device

Expected The scene is blurred due to the applied Gaussian DoF in the Post Process Volume

4.13 DOF does not work as expected on metal