First of all, make sure that you are not tracking changes in the affected document. Caption numbering may be incorrect until you have accepted (or rejected) changes and turned off the tracking.

If tracking changes isn't the issue, press Alt+F9 to display field codes. Assuming that you are using the built-in Figure caption, you should see { SEQ Figure } in place of the figure captions.

Note that captions will be placed in boxes if you add them to wrapped objects (that is, to objects whose Text Wrapping is not "In line with text").

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Stefan Blom
Microsoft Word MVP

Microsoft 365 apps for business
Windows 11 Professional