DocumentSelectionChanged event no longer firing in PowerPoint addin

[BioTaya]

Our PowerPoint add-in relies on the DocumentSelectionChanged event to update its state based on selection changes. This has been working since mid-2023. However, in the latest PowerPoint for Mac (version 16.94 (25020927), released Feb 11, 2025), the event no longer triggers, and our handler never gets called. I confirmed that it still works as expected in the previous version (16.93.2 (25012611), Jan 28, 2025).

We also tested the behaviour on the latest PC Desktop version of PowerPoint and PowerPoint on the web and the DocumentSelectionChanged event fires as expected. It is only an issue on Mac.

Provide required information needed to triage your issue

Your Environment

• Platform [PC desktop, Mac, iOS, Office on the web]: Mac
• Host [Excel, Word, PowerPoint, etc.]: Powerpoint
• Office version number: 16.94 (25020927)
• Operating System: ______
• Browser (if using Office on the web): ______

Expected behavior

The DocumentSelectionChanged event fires when there is a change in selection in PowerPoint and calls our event handler. (As it did before the most recent release)

Current behavior

The DocumentSelectionChanged event never fires when there is a change in selection in PowerPoint.

Steps to reproduce

1. Create a bare-bones PowerPoint addin and register an event handler for DocumentSelectionChanged that logs when it is called

Office.context.document.addHandlerAsync(Office.EventType.DocumentSelectionChanged, async () =>
            console.log('DocumentSelectionChanged fired'),
);

2. Verify that on Powerpoint version 16.94 (25020927) this never gets logged when changing the selection
3. Verify that on Powerpoint version 16.93.2 (25012611) (or other earlier versions) this does gets logged when changing the selection as expected

Link to live example(s)

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Provide additional details

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Context

Our addin requires this event for our functionality and has been using it for a year and half. Without this event our addin has a broken experience for users.

Useful logs

• Console errors
• Screenshots
• Test file (if only happens on a particular file)

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[alison-mk]

Hi @BioTaya, thank you for submitting this issue. @EsterBergen Could you take a look at this PowerPoint issue?

Cheers,
Alison

[bigelowt]

Is there an ETA for this fix, this bug makes our Add-in inoperable.

[zartinn]

We have experienced today exactly the same problem with our Addin, as well with at least one other major bug that got introduced with 16.94:
#5404

Please have a look into this asap