When you turn on your PS4 from standby mode, does it tell you that you aren't connected to the internet sometimes? This happens to me sometimes and it's frustrating. I had a couple of minutes to finish the 5GB download for MLB 14, so I turned it on to prepare to play. I go to downloads to check how many minutes are left, and it said cannot download because somehow the PS4 disconnected from my internet. So I try to resume the download, and it wont even resume. So I now have to start the whole damn thing over. And this has nothing to do with my internet, this never happened to me with the PS3, so it's clearly something wrong with the PS4.

I havent had that issue, I dont do much digital so I am not the best reference. Nothing that cant be patched if common issue.

I haven't run into that problem, but I have experienced some errors when trying to sign into PSN or the PS Store.

I've actually have had this happen to me, usually I just turn off my ps4 and it works fine

I get this issue frequently on one network I connect to, never had it with the other network.

I have no ideas about the specs of the network, except the one that has the issue is a BT branded router, and the one without the issue is a Sky branded router.