VBA Document_DocumentOpened event on stencil triggers only once.

[JuneTheSecond]

I am using Visio 2016 pro for Office 365.
My stencil is saved in "My stencil" folder.
It has VBA macro only for Document_DocumentOpened event in ThisDocumemt module.

Code

Option Explicit

Private Sub Document_DocumentOpened(ByVal doc As IVDocument)
    MsgBox doc.Name & " opened!"
End Sub

When I start Visio application, create a blank new drawing, open this stencl by clicking a menu "Other Shapes"/ "My Shapes! in shapes window, then the Document_DocumentOpened event triggers normally.
But when I close this stencil and open again in the same manner, the event never triggers.

I don't remember this is the same as in previous versions of Visio.
Am I missing something important?

[Yacine]

Just tested: absolutely no problem with your scenario in V2013.

[JuneTheSecond]

Thank you , Yacine.
Then it may be a bug in Visio 2016 pro for Office 365.
You had better wait buying until bug is fixed.

[JuneTheSecond]

Now, I am getting around this problem setting My Shapes folder as a trusted location.
I am referring to a document at https://support.office.com/en-us/article/Add-remove-or-change-a-trusted-location-7ee1cdc2-483e-4cbb-bcb3-4e7c67147fb4?ui=en-US&rs=en-US&ad=US&fromAR=1 .
But I am afread the security level is lower than before.

[Visisthebest]

JuneTheSecond did Visio open the stencil in protected mode, and was this the reason Document_DocumentOpened didn’t start when the stencil was opened?