First - I don’t think it’s a bike thing - I think it’s just random when it works and doesn’t work based on the bluetooth connectivity. You’ve had both successes and failures with the Cervelo and had both successes and failures in different applications - this leads me to believe it has nothing to do with the bike. Set aside the idea that it works on one bike and not on the other until we see more consistency in functionality.
So there are a number of threads about various bluetooth connectivity problems on these forums, you should take a read through this one when you have some time. It seems that in some troublesome (read: very busy electrically) areas there is a lot of interference that makes bluetooth connections like yours problematic. You may want to consider trying an ant dongle in your iPad as a possible solution
But…since you won’t have that with you today or tomorrow I’d recommend the following
- Close all applications on your iPad and make sure no other devices in the area have any connections with the trainer (particularly for you I guess this would mean your phone). Easiest to just turn everything else off entirely.
- Load up a workout in TrainerRoad on the iPad, make sure it is paired with the trainer then put the iPad on the ground right next to the trainer - something super short but with power adjustments so you can tell if it is working correctly (Log In to TrainerRoad)
- Ride and see if everything works
You can try this with either bike, but if you swap bikes I’d recommend you use the same rear wheel so that you aren’t changing multiple variables at the same time