I have spotted a minor bug with the Companion App. In specific circumstances it will display the workout-style dashboard even in free ride mode.
Steps to reproduce:
Open PC app and then open Companion app. Companion app switches to linked mode.
Pair trainer/pm/HRM/cadence on main app and get through to course/workout selection screen
Select workout and confirm
Change mind and remove workout, so that you will enter the game in free ride mode
The incorrect dashboard will be displayed. All other features of the app work correctly.
Zwift running on Windows 10 1709, latest updates applied to app
Companion App running on iPhone SE iOS 11.3 15E216