Average values in Unified Analysis View List Cards

[AntonioSousa]

I was looking for a way to get the average values in List Cards, in an Unified Analysis View.

It seems that although despite the column labels show [Average], they are really the last value, as can easily be seen in the Hosts Classic view, as shown below.

Is this a bug, or how do we really get the Average values, and what definition is needed in the yaml files?