BLE with BangleJS and GPS Device

I don't really know what to suggest - it's rare but usually if there is a disconnection at that point it's:

• due to some kind of disagreement between the devices about what they support in terms of connection - like what the connection interval is
  
• the device wants a secure connection (eg it wants a passkey) and nothing's been implemented on Bangle.js to provide that passkey
  
  

Does the GPS device usually want a passkey or something like that when you connect with the phone?