After 2 days and with help from meizufans users I know how to fix problem with notifications delay.
All You need is go to “Security” app and:
- Accelerator -> Settings - > Memory acceleration… - > Add to white list and then check google play services and apps You want to not to be cleaned eg. Whatsapp
- Permissions - >Auto run management - > and check google play services and some apps You want to auto start when closed like Gmail etc.
- In Permissions select all in Notifications management
- Power - > App management - >and select google play services and apps You don’t want to be auto closed after 3 minutes of idle.
That’s all :) I also installed PNF Root from G play, but probably You don’t need it