Label with FormattedText does not set TextColor correctly when switching from LightMode to DarkMode or vice versa

[Heinz12]

Description

If a Label has a FormattedText then the TextColor is not set correcly when switching from Dark to Light or vice versa!
For a Label without FormattedText it is working correctly.
See Screenshots below.

         <Label Text="{views:Translate SettingsActiveUserProfileTitle}" FontSize="Title"/>
            <Label>
               <Label.FormattedText>
                    <FormattedString>
                        <Span Text="{views:Translate CustomerNumberPlaceHolder}" FontSize="Micro" />
                        <Span Text="{x:Static system:Environment.NewLine}"/>
                        <Span Text="{Binding BmdUserProfile.CustomerNumber}" FontAttributes="Bold" />
                    </FormattedString>
                </Label.FormattedText>
            </Label> 

Expected Behavior

Should change the TextColor like the Label does.

Screenshots

Switching from Light to Dark:

####Switching form Dark to Light: