Updates 

Core Player

• Added a new property, cueType, to the addCues event, which adds a custom CSS class that can be used for additional cue styling in the format of .jw-cue-type-{cueType}.
• Added a new CSS class .jw-cue-type-ads to ad cues so they can be styled separately from other cues, such as chapter markers.
• Added support for 608 caption track names defined in the parent manifest via #EXT-X-MEDIA:TYPE=CLOSED-CAPTIONS tags.

Advertising

• To the VAST client, added support for the VAST 4.1 viewableImpression node, which adds a tracking pixel to the page when the adImpression event fires based on whether the ad is viewable at that time.

Fixes

Core Player

• Fixed a bug preventing captions from being cast to Chromecast.
• Fixing an issue occurring in some environments where resuming a stopped live stream turns captions off.
• Fixed an issue causing some HLS streams to stall when upshifting quality in Edge.
• Fixed a bug where captions no longer displayed after ads in Safari.