Office JS Api - Permission Denied Issue

I'm working on an addin for Excel, the manifest has permission for ReadWriteDocument.

I'm adding a handler to Office.EventType.DocumentSelectionChanged Event

First time, I insert the addin in Excel Online, it works perfectly.

Later if the access the Excel, it fails with:

OSF.DDA.Error
code: 7000
message: "You don't have sufficient permissions for this action."
name: "Permission Denied"