Other than hating the new upgrade and hoping I can find a way to get it back to how it used to be. Does anyone else face the issue of just numbers showing in recent call list as opposed to the names that are saved in your contacts? I have changed the theme several times and this seems to be an awful update issue rather than anything to do with a theme!
A screenshot would be helpfull but I believe that you have a black theme installed. Old themes are incompatible with Pie, please use a new compatible theme or the default theme and try using Night mode.