Hi @Jeff Bray,
I suggest you try to open Word in safe mode and check if this feature works in safe mode. It may have a software conflict that caused the feature to not work properly. Open Word in safe mode running the following command: Press Win + R, type "winword /safe" in the blank box, press Enter. If it works fine in safe mode, please check the add-ins in your Word and disable them.
Click File- Options- Add-Ins on the left side of the dialog. Then click the drop-down arrow at the bottom of the dialog box and select "COM Add-Ins" from the list, then click the GO button. What comes up is a list of COM-Add Ins that are loaded and running.
You can also try to repair Office to help you: https://support.microsoft.com/en-us/office/repair-an-office-application-7821d4b6-7c1d-4205-aa0e-a6b40c5bb88b?ui=en-us&rs=en-us&ad=us
Just checking in to see if the information was helpful. Please let us know if you would like further assistance.
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