Thanks for clarifying; the screen grabs help a lot. As you say, there’s clearly something amiss. I hope you get some traction with this.
Note: like Nigel, I don’t get the power colours in the end-of-game Ride Report Timeline and cannot get them in Companion as I use the iOS version. (The ‘tap for Power colours’ feature is only available on Companion on Android, apparently: Companion App Timeline Graphs with Colors (iPhone))