Default Terrible notification delay

Guys, im currently on android 4.4.2 (catalysm rom) I've a significant delay notification while screen off, when i turn off the screen the notifications magically comes out. How to fix it??? I've tried everything, flash the stock image, flash a kernel with prima drivers, turn off wifi optimization, changed radio from .98 to .97, did some test on wifi file changes like alot thread say, but nothing, still have this problem, does somebody have found a fix? Please any help is really appreciated.