The lights appear to flicker occasionally or the scene is not showing as active.
Check the included channels within the scene and verify the channels are not inadvertently assigned to control the same zone but configured at different levels.
For instance a channel assigned to control Zone 1 and a channel assigned to control Group 1 (which contains Zone 1). The scene could be configured to include Zone 1 and Group 1 but at different levels. This is not an appropriate setup often referred to as a group loop.