I’ve never noticed this, I’d bet it’s associated with your notification settings. My only gripe is that everytime my phone restarts, I have to open the app and reselected the ask first option for calling. Otherwise the number I don’t use associated with my service plan will be what I call from :/
Aegis is my absolute favorite for 2FA’s, give it a try for sure. Pretty sure it’s only available on Android unfortunately though.