Created attachment 420187 [details] A simple page (45 lines) to repro the issue Safari version 14 What steps will reproduce the problem? (1) Open the attached HTML repro case (45 lines total) (2) Optional: observe the sequence of events in the dev console logs What is the expected result? The repro page will insert two cues (1-2s and 2-3s), then seek to exactly 2s. Only one cue should be displayed at time 2s (the second one). What happens instead? In Chrome/Edge 88 and Safari 14, both are displayed at once. In Firefox 84, only the second cue is displayed (correct behavior). Additional context: It recently was pointed out to us in Shaka Player that our DOM-UI-based cue display got this wrong, too. The fix turned out to be a single character (> instead of >=). You may find something similar in WebKit. https://github.com/google/shaka-player/pull/3152/files
Corresponding Chromium bug: https://bugs.chromium.org/p/chromium/issues/detail?id=1178026
Thanks for the report Joey!
Happy to help! Thanks for taking a look.
<rdar://problem/74541188>
Pull request: https://github.com/WebKit/WebKit/pull/694
Committed r295647 (251652@main): <https://commits.webkit.org/251652@main> Reviewed commits have been landed. Closing PR #694 and removing active labels.