2.1.31 [W3C-HTML51] Section 4.7.14.11.1 Text track model

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V0089: The change event is not fired when the text track mode changes

The specification states:

 ... Text track model
     ...
     Whenever a text track that is in a media element's list of text tracks has its text 
     track mode change value, the user agent must run the following steps for the media 
     element:
         ...
         3.  Queue a task that runs the following substeps:
             ...
             2.  Fire a simple event named change at the media element's textTracks 
                 attribute's TextTrackList object.

EdgeHTML Mode

The change event is not fired when the text track mode changes.