App (Push Notifications) – not working

I posted in the wcfm marketplace thread, but I think is probably a more appropriate place for this question.

I am not getting any notifications sent automatically the app. It is authenticated to the site and I can update products. But orders and notifications in the app only update if I do a swipe down to refresh. No android notifications at all.

I am using nginx on my web server so I can’t do the .htaccess setting for HTTP Authorization Header, is this the problem?

I’ve installed a plugin to view Rest API logs, and I can see GET requests from the app but this doesn’t show any notification push. Which log can I look at to find out what the problem is?