Ionic Push Notifications strange behaviour

Hi there, today while i was using an app i developed with ionic push i noticed it fell back to SMS because push notifications were returning an error. So i went to, and tested sending one time notifications to my device. Sometimes they worked and sometimes they returned the same error that was ocurring in the app. The error in question is the following:
"Error parsing user IDs"
I did a google search and only found one thread in gitter with such error and it was because they were sending a lot of user ids, in my case it is only one and in happens intermittently.