Datediff minutes across different days not calculated correctly

Hi,

I have a dataset with dates in this format: dd/mm/yyyy hh:nn:ss. I want to calculate the number of minutes between consecutive timestamps using DATEDIFF('minute', LOOKUP(ATTR([Date (3)]),-1),LOOKUP(ATTR([Date (3)]),0)).

Whenever there is a change of day this is not calculated correctly. It seems as though Tableau mixes days and months. Yet, the dates are in the correct format, and when using

DATEPART('day', LOOKUP(ATTR([Date (3)]),0))

or DATEPART('month', LOOKUP(ATTR([Date (3)]),0))

or other datepart calculations, everything looks good.

Does anyone know how to solve this?

Thanks!