2 screensavers not working?

The way I understand it is that I can set up multiple screensavers and so have set mine up as below… The idea is that it shows a slideshow after 1m and then a blank screen after 2m… But it never seems to get to the second screensaver?

"screensavers": {
    "z1q5xmuf0ku11vz98p3rzhlq1": {
      "name": "1",
      "startTimeout": "1m",
      "clock": "date-time",
      "clockPosition": "corner",
      "brightness": null,
      "weatherConditionBinding": "p2d8sdilk7e1btrs40oubbha.weather.home#weather.condition",
      "weatherTemperatureBinding": "p2d8sdilk7e1btrs40oubbha.weather.home#weather.temperature",
      "backdropFromDashboard": false,
      "backdropBinding": "1ibvihpr3581p1vdxvouw2djma.previous-photos#image.collection.photos",
      "backdropInterval": "10s",
      "backdropTransition": "crossfade",
      "backdropShowInfo": true
    },
    "nn9umcl2vygj1guyeonb5hamn": {
      "name": "2",
      "startTimeout": "2m",
      "clock": "date-time",
      "clockPosition": "random",
      "brightness": null,
      "weatherConditionBinding": "p2d8sdilk7e1btrs40oubbha.weather.home#weather.condition",
      "weatherTemperatureBinding": "p2d8sdilk7e1btrs40oubbha.weather.home#weather.temperature",
      "backdropFromDashboard": false,
      "backdropBinding": null,
      "backdropInterval": "10m",
      "backdropTransition": "crossfade",
      "backdropShowInfo": true
    }
  }

Fixed for 28.11 patch release.