Android Question Duplicate message with SI_MessageReceived

Hi,

I'm facing a problem with SI_MessageReceived, all messages received appears in duplicate.

This is my code:

Sub SI_MessageReceived (From As String, Body As String) As Boolean


Log("My message: " & Body)
Return False

End Sub

Output:

My message: 1234
My message: 1234

Is there some parameter to prevent this or I got to check the last message, if different I discard.

Thank's