Lovelace - History Graph Card Issue

1

I am trying to make vertical stack of two history graph cards; one showing the house power consumption over the past 24 hours and the other over the past hour. Here’s my setup:

      - type: vertical-stack
        cards:
        - type: history-graph
          title: House Power - 24 Hours
          entities:
            - sensor.house_power
        
        - type: history-graph
          title: House Power - 1 Hour
          hours_to_show: 1
          entities:
            - sensor.house_power

The issue is, it show the same thing on both cards:

55%20PM
55%20PM361×587 21.8 KB

If I refresh the page a bunch of times, it will we eventually load the one hour graph correctly. I see this in Chrome and Safari on my Mac (running Mojave)

EDIT: It works correctly, if I reverse the order of the cards… not sure why that would be, but if I have the past 24 hour one first, the second one is incorrect.