Ed.ReadMusicEnd() returns invalid value

This is a simple demo that Ed.ReadMusicEnd() returns some invalid value.

#-------------Setup----------------

import Ed

Ed.EdisonVersion = Ed.V2

Ed.DistanceUnits = Ed.CM
Ed.Tempo = Ed.TEMPO_MEDIUM

#--------Your code below-----------

led = False
Ed.PlayBeep()
while True:
    while Ed.ReadMusicEnd() == Ed.MUSIC_NOT_FINISHED:
        pass
    led = not led
    if led:
        Ed.LeftLed(Ed.ON)
        Ed.RightLed(Ed.OFF)
    else:
        Ed.LeftLed(Ed.OFF)
        Ed.RightLed(Ed.ON)
    Ed.TimeWait(50, Ed.TIME_MILLISECONDS)

This program stays in endless loop after the first turn. It waits for status Ed.MUSIC_NOT_FINISHED but it never receives it. It passes first loop because Ed.PlayBeep() sets the status. But what happens to music status after that? Why it is set to Ed.MUSIC_NOT_FINISHED ??

Is it bug in ReadMusicEnd() or in robot firmware?

Bdanilko / EdPy

Ed.ReadMusicEnd() returns invalid value #4