Lovelace media-control and weather-forecast broken in main view vertical-stack with 0.81.0

[hudecitydave]

Home Assistant release with the issue:
0.81.0

Last working Home Assistant release (if known):
0.80.3

Operating environment (Hass.io/Docker/Windows/etc.):
Hass.io

Component/platform:
raspberry

Description of problem:
After upgrading to 0.81.0 my lovelace ui shows up with red areas in my main view vertical-stacks. The error shown is "Cannot read property 'states' of undefined", followed by a dump of the config, which is not copy/paste-able... Same config worked in 0.80.3.

For me the media-control and weather-forecast types are affected. Outside of horizontal or vertical stacks everythings works fine.

Problem-relevant ui-lovalace.yaml entries:
examples:

  - type: vertical-stack
    id: WohnzimmerSicht
    cards:
      - type: entities
        title: Wohnzimmer
        show_header_toggle: true
        entities:
          - sensor.co2ppm
          - sensor.wozitemp
          - sensor.wozifeucht
          - switch.fernsehgruppe
          - input_select.tvscene
          - switch.wohnzimmertv
          - switch.wohnzimmer_ecke
          - switch.wohnzimmer_sofa
          - switch.esszimmer
      - type: media-control
        entity: media_player.openelec
      - type: media-control
        entity: media_player.wohnzimmer
      - type: media-control
        entity: media_player.sony_bravia_tv
      - type: media-control
        entity: media_player.bespin
      - type: media-control
        entity: media_player.playstation_4

and

  - type: vertical-stack
    id: WetterSicht
    cards:
      - type: entities
        title: Wetter ASU19
        entities:
          - sensor.temp_feucht_temperature
          - sensor.temp_feucht_humidity
          - sensor.barometerdruck
          - sensor.gardenierung
          - sensor.abinsbeet
          - sensor.feinstaub_pm10
          - sensor.feinstaub_pm25
          - sun.sun
      - type: weather-forecast
        entity: weather.wetter_hude
      - type: picture-entity
        title: Bewölkung
        entity: camera.bewolkung
        camera_image: camera.bewolkung
        show_info: true
        tap_action: dialog
      - type: picture-entity
        title: Regen
        entity: camera.regen
        camera_image: camera.regen
        show_info: true
        tap_action: dialog

[paulvt]

Ah, it's the vertical stack that breaks it, thanks for pointing that out!
Same issue occurs in combination with a sensor card too.

[cocomaddox]

The upgrade has broken most of my cards. Have spent hours trying to isolate the issue with no real success so have restored a backup and will wait for 0.81.1. Hopefully whatever happened to break this will be resolved then.

[hudecitydave]

Additionally my camera items within a horizontal-stack do not open the "full-image-sizeoverlay" on click. I think something essential is broken in lovelace with the actual update.

[ronytomen]

Can can confirm having the same issue as @hudecitydave with Camera cards but in a vertical stack. I too rolled back to 0.80.3 because of this issue and 2 others.

[fillwe]

Same issue here but with horizontal stack and sensor cards since updating!

[vandalon]

Same issue here. but in some cases vertical stack works (home page) in other it just don't work and yet another i get the above error. this is only with media-control items. when removing media-control items the error disappears but stacking does not work anymore.

Weird thing is that stacking is working on my default / home tab.

[vandalon]

So it seems that with cards in some kind of order it does work ( i had the climate card as last card in my first vertical stack and that worked. removing the climate card broke vertical stacking completely).

[vandalon]

also column_width: calc(100% / 3) seems to be ignored. when only showing 3 items it's ok. But when a fourth item comes up I get 4 items on 1 line instead of a new line.

[ulnic]

Having the same error when using vertical stack combined with condition cards.

[ghost]

This issue was moved by fabaff to home-assistant/home-assistant-polymer#1904.