Grouping of Ages in Pivot keeps ungrouping upon reopening of workbook

Grouping of ages in pivot table keeps "ungrouping" when workbook is closed and reopened even though nothing in the data source has changed.

Does anyone know why this is happening?
Chanel GouwsReward and People Analytics SpecialistAsked:
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Martin LissOlder than dirtCommented:
Can you attach the workbook?
Chanel GouwsReward and People Analytics SpecialistAuthor Commented:
Managed to figure out where the problem was, I forgot my age formula was running on a "=yearfrac(X; today())" and would obviously recalculate every day once the book was opened.

Thanks for the help though!

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Chanel GouwsReward and People Analytics SpecialistAuthor Commented:
Came across the error in my workbook
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Microsoft Excel

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