Setting the app icon for Voyager seems to only apply to the icon shown for the app on the selected screen, but it does not for example apply to the icon shown for the running apps carousel.
Setting the app icon for Voyager seems to only apply to the icon shown for the app on the selected screen, but it does not for example apply to the icon shown for the running apps carousel.
Quit and restart the app. It should show the correct icon.
Also, try restarting the device