Uncaught TypeError: Cannot set properties of undefined (setting 'discontinuity')

[cvrobot]

Exception occur when play follow url:
https://storage.googleapis.com/shaka-demo-assets/angel-one/dash.mpd

video.js:36749 Uncaught TypeError: Cannot set properties of undefined (setting 'discontinuity')
at video.js:36749:44
at Array.forEach ()
at updateSequenceNumbers (video.js:36705:18)
at positionManifestOnTimeline (video.js:36841:5)
at toM3u8 (video.js:37268:14)
at parse (video.js:38645:12)
at parseMainXml (video.js:42611:22)
at DashPlaylistLoader.handleMain_ (video.js:43150:21)
at DashPlaylistLoader.refreshMedia_ (video.js:43254:14)
at DashPlaylistLoader.haveMetadata (video.js:42978:12)