I've been hoping it would be fixed in the last two releases of the firmware, but my PS3 and PS4 will have problems with a continual download.
The weirder thing is that my Xbox 360, Xbox One, laptop, etc. will be fine. My PS Vita tends to have this same problem too though.
I've noticed even when I do an internet connection test, everything will be fine except the download and upload test that will fail.
Does anyone know how to fix this? Why is this only happening to Sony products?