Sharepoint list import missing column data

[Anonymous]

I am working on a visualization in Power Bi with data imported from a SharePoint list. One column of the data type "person or group" is shown in the data selection tab, but tha data isn't imported correctly - in PowerBi Web, it seems like there are only missing values in the column.

The same goes for trying to visualize the values.

But if export the data as excel and import the xls file in Power Bi desktop, all data is there - so the column definetly contains values.