I recently ran into an issue where there were data differences between what was displayed in the app and what was displayed in the source model. The source model had the accurate data while we could not trace where the data in the app had come from. I checked the usual suspects to confirm I was looking at the same modules/line items and confirm my pivots were the same yet still saw the discrepancy for over an hour. The issue then seemed to resolve itself where the data matched without any changes (that I know of).
Has anyone run into this issue before? Is this a known bug? Is there another potential cause I may have overlooked?