Mismatch Between SSAS Tabular Model Measures and Data Warehouse Values in Power BI (Direct Query)

I am building a SSAS Tabular model on Visual studio, i created some measures in the Tabular model (like SUM, YTD, etc.) and then deployed the model to SQL Server Analysis Services, and then connected Power BI to the Analysis Services using DirectQuery.

However, the values returned by the measures in Power BI are slightly different from the values I see when I run the same measures directly in the Tabular model or check them against the Data Warehouse.

Has anyone experienced something similar or can point me in the right direction? Thanks in advance for any help