Comparing last 12 months to previous 12 months (partial problem)

Hi DutchMark,

We sincerely apologize for the inconvenience caused.

As the issue is still not yet resolved, we kindly request you to raise an issue at Issues - Microsoft Fabric Community for investigation.
Otherwise raise a Microsoft support ticket using the link provided below. They will be able to provide specific insights related to your account and potential resolutions.
Microsoft Fabric Support and Status | Microsoft Fabric

If you find our response helpful, kindly mark it as the accepted solution and provide kudos. This will assist other community members facing similar queries.

Thank you.