The test at media/modern-media-controls/tracks-panel/tracks-panel-controls-bar-remains-visible-after-clicking-over-it.html fails consistently. Somehow, the controls are faded after clicking on the controls bar to dismiss the tracks panel, while they should remain up. The auto hide controller fires although it ought to be suspended.
Created attachment 333171 [details] Patch
Committed r228185: <https://trac.webkit.org/changeset/228185>
<rdar://problem/37282207>