Hi @RazikM ,
It is beacause that in Power Query Editor, there are two data types not currently present in Data or Report View: Date/Time/Timezone and Duration.
When a column with these data types is loaded into the model and viewed in Data or Report view, a column with a Date/Time/Timezone data type will be converted into a Date/Time, and a column with a Duration data type is converted into a Decimal Number, such as 0.00:00:00 (D.HH:MM:SS).
You'll likely need to write a measure to format exactly how you want.
Sample data: 0.18:01:00
Measure = FORMAT(MAX('Table'[Column1]),"hh:nn:ss")
Or you can use the following formula to create a custom column in Power Query to return the total hours.
Community Support Team _ xiaosun
If this post helps, then please consider Accept it as the solution to help the other members find it more quickly.