[Media Controls] Releasing mouse pointer over video after interacting with the volume slider toggles the video's play state

• Component: Media
• Status: NEW ---

[Antoine Quint]

Steps to reproduce:

1. Go to a page containing a <video controls> element, for instance https://www.ac-paris.fr/portail/jcms/p2_943816/affelnet-comment-ca-marche
2. Once the video is playing, interact with the volume slider and make sure to release the mouse outside of the bounds of the volume slider and over the video

Expected results: the video playback state isn't changed.

Actual results: the video pauses if it was playing and plays if it was paused.

This isn't a recent regression as a build from early October reproduces the issue. I did not look further in the past.

[Radar WebKit Bug Importer]

<rdar://problem/78614693>