It's working fine for me too on a Galaxy Alpha.
Here’s how to check your Download Manager settings.
1.Open your device’s main Settings menu.
2.Under “Device”, touch Apps or Application manager (depending on your device, this may be different).
3.Swipe to view “All” apps.
4.Select the Download Manager app. ?If you see an Enable option, Download Manager is turned off. Touch Enable to turn it on.
?If you see a Disable option, Download Manager is turned on. Keep Download Manager turned on to download apps.