But all my Bluetooth devices remain paired, so when I turn them on they just connect straight to the phone without it needing to be unlocked.
Yep. That is how ‘most’ devices work. For whatever reason, the Wahoo cycle computers don’t work like this.
They pair via the app; they will not pair with a phone just by turning them on somewhere close to the phone, unless the app is running.
This different operation is somewhat confirmed by going into the Bluetooth setting on the phone. You get a list of paired devices; mine has my headphones, speaker, 3 different cars & my Wife’s mobile. But no Elemnt Bolt.
You also get a different icon when the Bolt does connect to the phone via the app – rather than the normal bluetooth symbol changing slightly to show a connection, you get a new bluetooth symbol come up on the left-hand side of the notifications bar, where you get app info (like Spotify symbol, new e-mails, ebay info etc)…