Y does't recive any whatsapp messages when screen is sleeping, when i unlock the devices comes all messages.
What operating system are you folks using? (7.1.1, 7.1.2 or 8.0.0)
Whatsapp (v2.18.46) working ok here on 7.1.2
Same problem here on Oreo Stable - February patch V5.22A on TA-1053
When I do whatsapp calls, sometimes whatsapp is just getting closed while talking without any notification(killed by system, I guess)
WhatsApp worked fine on Oreo Beta.
I also discovered, that some apps other apps are closed while running in background. In particular, I was listening to an audiobook when it suddenly stopped playing and the app was killed.