Hi @llss86,
Do you save your SP list records into a Collection within your app?
Is the Responsable column a Person type column in your SP list?
I think it is a known issue that when you save your SP list records which includes a Person type column into a Collection, the Person type column would be saved as a Table value rather than Text value within the Collection.
The user @priyankbhat has faced same issue with you, please check the response within the following thread:
https://powerusers.microsoft.com/t5/General-Discussion/DataTable-is-showing-object-Object-in-column-for-data-from/m-p/137040
Based on the needs that you mentioned, I think the AddColumns function could achieve your needs. I have made a test on my side, please take a try with the following workaround:
Set the OnVisible property of the first screen of my app to following:
ClearCollect(RecordsCollection, '20181119_case13')
Set the Items property of the Data Table control to following:
AddColumns(RecordsCollection, "ManagerValue", Manager.DisplayName)
Note: The Manager column is a Person type column in my SP list.
On your side, please take a try with the following workaround:
AddColumns(CrearTarea, "ResponsableValue", Responsable.DisplayName)
Note: The CrearTarea represents the Data source you typed within the Items property of the Data Table control.
Then display/enable the "ResponsableValue" field within your Data Table control.
More details about AddColumns function, please check the following article:
AddColumns function
Best regards,