Journey to Bluetooth Keyboard interference on iMac

By ghost keyboard I mean that the screen is responding to characters, primarily left and right arrow keys. I can place the cursor in a new position in the buffer (in EspruinoIDE) and it will run to beginning or end of buffer, one character at a time, at a perceptible rate (8/8 time?).

When I disconnect from puck the effect goes away, but this time my keyboard had disconnected and would not reconnect.

I replaced the batteries in the keyboard and the ghost has gone away. I guess that this is an odd end of battery life phenomenon.

I am now able to start using my puck, so I am not so bothered about accessing if from Ubuntu.

Thanks for your support.