No notification when phone in sleep

Having a few problems receiving messages when phone in/taken out of sleep Jami not running in foreground. Nothing comes through, left for 5-10 mins, nothing. Sent another message and then swam syncs. I feel if I hadn’t “nudged” the phone no messages will be delivered. Any ideas how to keep the heart beating? :wink:

https://docs.jami.net/user/faq.html#what-if-i-disable-the-dht-proxy-on-android-and-what-about-push-notifications