shaka-player: Safari rapid seek hangs stream

What version of Shaka Player are you using? 3.0.10 and 2.5.21

Can you reproduce the issue with our latest release version? Yes

Can you reproduce the issue with the latest code from master? Yes

Are you using the demo app or your own custom app? Demo app

If custom app, can you reproduce the issue using our demo app? Yes

What browser and OS are you using? iPad mini 2 12.5.1 Chrome 87.0.4280.163 / Safari 12.5.2

What are the manifest and license server URIs? https://demo.unified-streaming.com/video/tears-of-steel/tears-of-steel-multiple-subtitles.ism/.m3u8 Tears of Steel (HLS, Subtitles) from All Content tab

What configuration are you using? What is the output of player.getConfiguration()? https://shaka-player-demo.appspot.com/demo/#audiolang=en-GB;textlang=en-GB;uilang=en-GB;asset=https://demo.unified-streaming.com/video/tears-of-steel/tears-of-steel-multiple-subtitles.ism/.m3u8;panel=ALL_CONTENT;build=uncompiled;nativecontrols

Default configuration but with native controls

What did you do? Load the stream, on the native controls click fullscreen, seek a big chunk by dragging timeline (not by short incremental seek buttons)

What did you expect to happen? Player resumes after seeking a big chunk in fullscreen

What actually happened? After seeking on fullscreen player “freezes”, not resumes, there is no other way than cancelling fullscreen and seek again and click play to recover the player

More info As Safari / Chrome on iPad allows to play m3u8 directly, I tried to load this same stream and do the same behaviour (fullscreen + seek) and it works correctly there.