Hi there, after hours spent in trying to understand the problem I found it.
The plugin is not compatible with OneSignal push notification 2.00. Actually lots of plugins are not compatible with that.
Anyway I had to downgrade one signal. that fixed the problem.
Just for curiosity, how does it work in these cases ? you make changes to your plugin or do they have to take care of fixing their plugin ?
thanks, have a great day..!