I waited quite a while before jumping to 1.4 from 1.2. And now I regret it.
I can’t play at all from the USB disc I used all the time on 1.2. Radio is working fine so the DAC is working.
I can see the files in Browse. But as soon as the are in the playlist they all disappear one by one, sometimes it plays a second or to before going to the next file and the one before is gone! Very irritating. Have redone the install of the image file twice.