Google Nexus 7 (2013) — Nexus 7 2013 wifi 4.4kitkat system update problem

So still no lollipop on my nexus 7 2013 wifi, its not rooted, i did a factory reset to start fresh, i did a backup before that. when it finished factory reset backup restored all and it works ok and again still no lollipop but a new problem started to show. Before i did a factory reset my system update automatically checked for updates 2-3 times a day, but now it doesnt do that at all i can check it manually but it doesnt check it automatically. whats the problem? can i fix it somehow? thanks to all who can help

p.s. i can see that my apps wont automatically update like before even tho my play store is set to update automatically