[Q] Wireless connection & Push Notifications topic

I own a LG G2 with CM11 (latest nightly 01/29/2014)

When I'm on wifi i got a huge delay in push notifications, and, as soon as i turn my wifi off and mobile data on, I get all the notifications that wifi delayed.

I can get notifications even in wifi, but they can take up to 30 minutes to be delivered to me.

What is wrong in android? My iphone notifications work..