I use the function SendPushToTargetUsers to send push notification to users using a query to filter.
Recently the function did not sent any push notification.
The function give me a positive response but the message is not sent.
How I can understand why there are this problem ?
I see that in you SDK documentation THERE IS NOT notice of this function (but some time ago I read about it)
How a can send a push notification to a subset of my users ?