I'd like to dig this up cause I've noticed this being a problem since 12.14:
Here is the xaml information for some of the theme files that display clocks that I use:
./Views/PlatformWheel1FiltersView.xaml:171: <TextBlock Name="tbArrivalDateTime" Text="{Binding Source={x:Static sys:DateTime.Today}, StringFormat='{}{0:MMMM dd, yyyy}'}" FontFamily="{StaticResource FontBebasNeue}" VerticalAlignment="Center" HorizontalAlignment="Right" DockPanel.Dock="Right" FontSize="37" Foreground="Gold" />
./Views/PlatformWheel2FiltersView.xaml:160: <TextBlock Name="tbArrivalDateTime" Text="{Binding Source={x:Static sys:DateTime.Today}, StringFormat='{}{0:MMMM dd, yyyy}'}" FontFamily="{StaticResource FontBebasNeue}" VerticalAlignment="Center" HorizontalAlignment="Right" DockPanel.Dock="Right" FontSize="37" Foreground="DeepSkyBlue" />
./Views/TextGamesView.xaml:191: <TextBlock Name="tbArrivalDateTime" Text="{Binding Source={x:Static sys:DateTime.Today}, StringFormat='{}{0:MMMM dd, yyyy}'}" FontFamily="{StaticResource FontBebasNeue}" VerticalAlignment="Center" HorizontalAlignment="Right" DockPanel.Dock="Right" FontSize="37" Foreground="Gold" />
./Views/Wheel1GamesView.xaml:283: <TextBlock Name="tbArrivalDateTime" Text="{Binding Source={x:Static sys:DateTime.Today}, StringFormat='{}{0:MMMM dd, yyyy}'}" FontFamily="{StaticResource FontBebasNeue}" VerticalAlignment="Center" HorizontalAlignment="Right" DockPanel.Dock="Right" FontSize="37" Foreground="DeepSkyBlue" />
You'll see that each uses the same exact code, however the Game views all update the clock correctly, while Platform Views do not change the clock at all. The clock stays at the same time as the view was first loaded, and from what I can tell it never really gets unloaded though I don't think that's part of the issue. I've tried different variations of the DateTime Struct (such as Now, etc), however the time still never updates on Platform views and only on the Game views.
If you can provide a fix that doesn't require me to update, that would be fantastic. My setup is finally perfectly configured, the only issue is the clock on the platform views. Everytime I update, some other aspect breaks (12.15 for example broke VLC as a video renderer for me so I'd like to stick on 12.14)
Thanks