I’ve tested sending the notifications using the Backendless panel and the API method. I don’t have a great sample of devices, but there was some strange behaviours.
The notifications were delivered as the expected to almost all devices by the 2 methods. But in 3 of them the devices only received the message generated by the API and 4 of the devices didn’t receive any notification.
The coincidence in this group that didn’t receive any message is 3 of the devices are Samsung with Android 10.
I’ve saw some recommendations in others topics like adding “android-ticker-text”, “android-content-title” and “android-content-text”, but this didn’t make any difference.
The count of Push Messages in the panel increased after the command showing that the message was sent, the question is only to understand why is not reaching all the devices and if there is any acessible log to verify.