I ran into a bit of an issue myself last night with my HR and the Vado...but I'm also inducing some new variables with my Garmin Watch. Using the ebike, it will show me my HR on the device and/or my watch instantly, but it isn't displaying at all in the app after the fact. I realized that I will have to donate to the Dev to get these features. I'm hoping my donation kicks in soon, as I'd really like to gather all the possible data.
This was my main concern with going ebike....my watch would see that I'm zipping along at 20+ mph for an hour with a low HR and presume that I'm more fit than I am, but now that it can capture wattage, cadence and some other metrics like assist level and such, I can get a really good idea of my fitness, and ideally travel further for longer before getting tired.
The app is eBike within ConnectIQ for anyone else that might stumble upon this.