Thanks for reaching out. Let's check on this further.
A few questions — are you referring to the sound of the notification that comes from your phone? Is this happening to all of your notifications?
Is this happening on multiple phones?
Keep us posted.
Just checking in to see if you still need assistance with this issue. We'll leave this topic open for another 24 hrs in case there are any follow up questions or comments. Please let me know if you need further assistance.