use crossfade
MODIFY
WalletWasabi.Fluent/Views/MainView.axaml
WalletWasabi.Fluent/Views/MainView.axaml
<vl:ScreenViewLocator />
</rxui:RoutedViewHost.ViewLocator>
<rxui:RoutedViewHost.PageTransition>
- <PageSlide Duration="0:0:0.25" />
+ <CrossFade Duration="0:0:0.25" />
</rxui:RoutedViewHost.PageTransition>
<rxui:RoutedViewHost.DefaultContent>
<TextBlock Text="Default content"

use crossfade