Switcher is in the headerbar glitch on startup
Sometimes, when starting the app (usually the first time the app is started after boot), the view switcher is visible in the headerbar for a split second, before disappearing and re-appearing at the bottom. This looks quite glitchy and isn't a great first impression of the app.
I'm not sure if this is an issue with Calls or the way Phosh sizes the window, feel free to move to the appropriate place.