Time Remaining Still Not Working?

Configuration
1

Is the remaining time attribute still not working on the timer entity? Just curious. I’ve been needing this for a long time but haven’t found a simple solution.

2

In my experience, Developer Tools always the remaining time attribute incorrectly equal to the duration

You can see the remaining time in lovelace with this:

              - type: 'custom:button-card'
                entity: switch.whatever
                name: 'Whatever'
                variables:
                  timer_var: "timer.whatever"
                template: 
                  - timer

And include this under: button_card_templates:

  timer: # use with toggle
      variables:
        timer_var: "placeholder"
      triggers_update: all
      custom_fields:
        desc:
          card:
            type: custom:button-card
            entity: '[[[ return variables.timer_var ]]]'
            show_name: false
            show_icon: false
            show_state: true
            styles:
              card:
                - font-size: 12px
                - box-shadow: none
              state:
                - color: >
                    [[[
                      if (states[ variables.timer_var ].state == 'idle')
                        return "white";
                      else
                        return "red";
                    ]]]```