For whatever reason, my tab key stopped working altogether in xCode editor. It works in other apps fine.Tried upgrading to xCode 13.3. Same thing. Ideas?

Can't get any of my breakpoints to work in SwiftUI app. I ensured I'm building/running debug build. Also reviewed build settings/signing. Tried to clean build folder, then exit Cmd-Q & restart to no avail. Any ideas? Config: M1 Mac - 16GB Xcode 13.3