Activator 00064B76 (MarkarthCourtSceneTrigger) is supposed to trigger DialogueMarkarthKeepIntroCourtSceneView scene between jarl Igmund, steward Raerek and housecarl Faleen as a bystander when they are in the "throne room".
Issue 1: the activator's script is configured to trigger when Igmund, Raerek and Faleen are inside it, but the script does not check for the player. This results in the scene being triggered as soon as the player enters the cell when those 3 are in the throne room. With the main entrances to the cell located far away, well out of the voice range, this means that you can actually hear the scene only if you catch the three NPCs entering the room around 08:00 or if something (combat or mods) makes one of them leave the room between 08:00 and 20:00 and then re-enter the trigger again.
Issue 1 can be fixed by adding Player as a 4th tracked actor in the activator's script properties, but this would bring another 2 issues:
Issue 2: Faleen force-greets the player the first time you approach the jarl, and that force-greet has a rather decent radius. And DialogueMarkarthKeepIntroCourtSceneView scene does not override that force-greet package. So it can easily result in the scene playing and Faleen force-greeting simultaneously, with Faleen talking over Igmund and Raerek.
Issue 3: The activator is not disabled after triggering the scene, so the scene will be played every time the player or the involved NPCs pass near the throne room, over and over again.
Issue Data
Issue #35600: MarkarthUnderStoneKeep cell - problems with DialogueMarkarthKeepIntroCourtSceneView scene