It has been my experience that the Azure Cost Analysis isn't as granular at calculating costs at the resource level.
Or it may be that the Azure cost calculator doesn't update it's statistics as frequently as from where the Sentinel workbook is pulling the information from, so you may need to wait longer to see the update.
However I'd be happy to replicate your finding if you can tell me what filter settings you used in the Azure cost analysis, or provide a screenshot without your personal data in the image.