RESOLVED FIXED311100
Scrubbing a YouTube video in full-screen causes it to exit full-screen mode. 
https://bugs.webkit.org/show_bug.cgi?id=311100
Summary Scrubbing a YouTube video in full-screen causes it to exit full-screen mode.
Jean-Yves Avenard [:jya]
Reported 2026-03-30 05:17:49 PDT
1. Launch Safari 2. Navigate to YouTube.com 3. Start watching any video 4. Put the video into full screen 5. Drag the slider on the timeline forward or backwards 6. Repeat Results: Video eventually exits full-screen mode. Another, often easier to reproduce: https://jyavenard.github.io/htmltests/tests/elementFullscreenMSE.html start playing, seek toward 8s, rewind the playback slider slowly and continuously toward the start of the video. A decoding error will occur.
Attachments
Add attachment proposed patch, testcase, etc.
Jean-Yves Avenard [:jya]
Comment 1 2026-03-30 05:18:00 PDT
rdar://172682230
Jean-Yves Avenard [:jya]
Comment 2 2026-03-30 06:36:23 PDT
Pull request: https://github.com/WebKit/WebKit/pull/61694
EWS
Comment 3 2026-04-01 21:03:39 PDT
Committed 310415@main (2fcceeb9c6b0): <https://commits.webkit.org/310415@main> Reviewed commits have been landed. Closing PR #61694 and removing active labels.
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