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Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
@Gordon
As @Ollie says, it's almost certainly another app.
The Puck can only accept one connection at a time so there's no point it advertising - arguably it might be more confusing if you could see it but couldn't connect :)
I'd force-quit any apps on your phone that you'd tried to connect to the Pucks with. Some apps will auto-connect to the Puck once set up, so will cause you all kinds of problems.
Also, have you tried to connect with a desktop/laptop? It could be that is auto-connecting as well - in troubleshooting there are instructions to stop it happening on Mac.