button-card: Cannot read property 'states' of undefined.

Checklist

• [x ] I updated the card to the latest version available
• [x ] I cleared the cache of my browser

Describe the bug Sometimes when I enter a page I get the following error button-card.js:1638 Uncaught (in promise) TypeError: Cannot read property 'states' of undefined It happens on this part: this._stateObj = this._config.entity ? this._hass.states[this._config.entity] : void 0;try { When I then keep that page open for some minutes some of the button cards suddenly starts working and show up (otherwise they are just empty/not visible).

Version of the card Version: 3.3.5

To Reproduce It happens in different ways I use button card but an example is:

- type: custom:auto-entities
            filter:
              exclude:
                - entity_id: '*battery_state*'
              include:
                - entity_id: '*battery*'
                  domain: sensor
                  options:
                    type: custom:button-card
                    template: house_data_item
                    entity: this.entity_id
                    icon: >
                      [[[ 
                        if (states[`this.entity_id`].state == 'unknown'){
                          return 'mdi:battery-alert';
                        } else {
                          return 'mdi:battery';
                        }
                      ]]]
                - type: custom:button-card
                  color_type: blank-card
                  aspect_ratio: 1/1

Desktop (please complete the following information): Latest version chrome