Yes, that was the first thing that I checked, and it is not blocked. Anyhow, I uninstalled and reinstalled, and am now receiving notifications, albeit sometimes with a slight delay.
good to hear - it hasn't been widely documented, but there have actually been TWO updates in the last 48 hours to the whatsapp app - as well as their notification servers being improved/fixed. So yeah, it makes sense - perhaps when you reinstalled you inadvertently got the new version and now it's working.