In Word for Mac desktop, an Office add-in task pane opens and then closes/crashes only when a SharePoint-hosted document contains comments and AutoSave is ON.

Question

In Word for Mac desktop, an Office add-in task pane opens and then closes/crashes only when a SharePoint-hosted document contains comments and AutoSave is ON.

RahulK 20

In Word for Mac desktop, an Office add-in task pane opens and then closes/crashes only when a SharePoint-hosted document contains comments and AutoSave is ON. The same document works in Word Online, works as a downloaded local copy with comments, and works in Word for Mac with the SharePoint file open when AutoSave is OFF.

When AutoSave is OFF, Word is still rendering the SharePoint file and comments, and add-in does not crash. When AutoSave is ON, and Word enters the live coauthoring/sync mode, it appears to be destabilizing/unloading the add-in pane.

Mac Word Version - 16.110.1 (26062112)

0 comments

1 answer

Your answer

Answer 1

Hin-V 16,155 Microsoft External Staff Moderator

Hi @RahulK

Thank you for reaching out.

To ensure I fully understand your situation and provide the most effective assistance, I’ll need a few additional details, such as:

Could you please confirm whether this behavior began after updating to Word for Mac version 16.110.1 (26062112), or if it was present in earlier versions as well?

Does this issue occur across all add-ins, or only with a specific add-in?

Is the issue affecting all users in your environment, or only certain users or devices?

Any update would be greatly appreciated.

Please understand that our initial reply may not always immediately resolve the issue. However, with your help and more detailed information, we can work together to find a solution.

Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.

RahulK 20 Reputation points

2026-06-29T07:02:26.5533333+00:00
Hi @Hin-V ,

The issue was happening even for earlier versions.

We only have one add-in created for our use case and issue is reproducible there.

All users who can access the add-in are affected.
Hin-V 16,155 Reputation points Microsoft External Staff Moderator

2026-06-30T22:25:56.0633333+00:00

Hi @RahulK

Thanks for the additional details.

Based on your description, this is most likely an environment-specific issue rather than a problem with the add-in itself. The issue appears under the following conditions: the file is stored on SharePoint, the file contains comments, and AutoSave is enabled. This may cause Word to enter co-authoring or real-time sync mode. In this state, Word for Mac may continuously refresh or reload the document state, which can cause the task pane to be unloaded, resulting in the add-in being closed or crashing.

Additionally, this behavior may be influenced by tenant-specific factors, such as SharePoint / OneDrive configuration and differences in feature rollout (for example, AutoSave or co-authoring not being consistently enabled across tenants).

However, I have not yet been able to reproduce exactly the issue or find similar reports matching your scenario yet. To help you reach your goal more effectively, I recommend engaging with [GitHub Community Forum] for a deeper technical dive or to connect with individuals who have relevant experience and expertise. Some approaches may behave differently or be restricted depending on your specific environment and configuration. These forums include many experienced developers and Microsoft specialists who can assist with troubleshooting and guidance.

Apologies for redirecting you to the related development team support. As moderators in this community, I do not have access to your specific tenant configuration, and my testing environment is limited. Therefore, my guidance is based on available Microsoft documentation and resources. That said, I’ll do my best to provide additional insight where possible.

Appreciate your patience and understanding.

If there’s anything else I can assist you with, please don’t hesitate to reach out at any time.