By default, Slicers are set to Show items deleted from the data source. If you disable this option, you should find that the slicers refresh properly when the pivot table is refreshed.
To access this option, first select the Slicer and then click Slicer Tools > Options > Slicer > Slicer Settings. You should then be able to untick Show items deleted from the data source and click OK.
You can also access this options menu by right-clicking on a Slicer and clicking Slicer Settings from the shortcut menu.
For more about Slicers, see the following video lessons:
Expert Skills Lesson 5-8 Filter a pivot table visually using slicers
Expert Skills Lesson 5-10 Use slicers to create a custom timeline
Expert Skills Lesson 5-25 Use slicers to filter multiple pivot tables
As usual, please feel free to reply if you need any more assistance with this.
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