I think that my PS4 isn't working correctly in standby mode

[JOKA_]

Teflon02 said:
<snip>.... Try going to your downloads right when you boot up, it will show you that the games already downloaded and installed. ...</snip>

I do that each time and each time it is starting to download the update from scratch.  2 days ago I turned on the PS4 and a message that Battlefield 4 was added to downloads appeared.  I checked the downloads screen and it was starting at 0% of about a 900MB update (took about 30 minutes to complete) 

:(