Active cues should be silently removed (i.e., without event dispatching, because the cue doesn't exist anymore) from m_currentlyActiveCues as well. This also causes an assertion failure in MediaControlTextTrackContainerElement::updateDisplay() ASSERTION FAILED: cue->isActive() Easily reproducible by calling textTrack.removeCue(textTrack.activeCues[0])
*** This bug has been marked as a duplicate of bug 104594 ***
Thanks Victor, can you please upload your patch in bug 104594