Hello and commiserations, my fellow postie.
They can also lag terribly, or not at all, or come back with the message "sorry, we're not in right now or "you are being recorded right now".
If anyone has a ring doorbell and has got video footage of a postie saying direct to camera, "well, I can juggle, maybe be do a song and dance routine, tell a few jokes... What would you like?", that was me.