Bluetooth buffer question -- tracking down an issue..

Looks great!

I moved the sensor UART to a different GPIO and it seems to be much happier. Does that make sense to you?

Not really - the pins shouldn't make any difference. As @jijidad says, Bluetooth.setConsole(true); should do the trick for you. That's a good point - I'll see about adding it to the Bluetooth LE troubleshooting.