A second press restarted the message from the beginning. What the operator wants
there is to cut it short — enough heard, or pressed by mistake with the
transmitter keyed — and then to be able to send it again at once.
It now shows a stop square while playing and releases the PTT through the same
path the natural end uses, so nothing is left keyed. Together with the device
handover fixed a moment ago, sending again immediately afterwards works.