Avatar Controls does not generate correct abbreviation when email is used as Description

Hello,

In the documentation I see that if an email, in the format of "first.last@domain.com", is set as the Description for the Avatar control, the generated abbreviation should be "FL".
However, I see that instead it is "DC", so it is using the words after the "@" symbol.

I've seen it in both versions 25.1.0 and 24.1.1, using the sample browser with:

<shared:Avatar
    x:Name="avatar"
    Width="100"
    Height="{Binding RelativeSource={RelativeSource Self}, Path=Width}"
    CornerRadius="50"
    Description="first.last@domain.com" />

Thanks in advance.