Re: multiple vtt tracks are not working in custom player (videoDisableUI = true)
Please report your issue via the Beta Developer program. The program provides developers with access to beta OS versions months prior to rollout into production.
If you are not yet enrolled please follow the link below to start the process. Once enrolled, you can register test devices to which we'll push the latest beta builds for your testing purposes.Make sure to not register all your devices as you will need test devices that are running the production OS as well.
We recommend that all developers take advantage of this opportunity to test channels for regressions and/or other OS related issues. Reporting OS issues via the program increases the likelihood that they will be addressed on our end and reduces the risk of unexpected user impacting issues upon release.
The program opens up prior to all OS releases, which occur on a summer and fall release schedule. During these times we push beta OS builds to registered devices for testing.