Card may not be displayed if one stack contains another stack

[ildar170975]

Checklist:

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

Release with the issue: 0.2.0

Last working release (if known):

Browser and Operating System: Win10x64, Chrome

Description of problem: If one stack-in-card contains another stack-in-card, the card my not be displayed:

1. Open some dashboard.
2. Switch to "edit" mode.
3. Add a new card and then paste code into Editor. Save the changes.
4. The card is not displayed:
5. Switch off the edit mode.
6. The card is not displayed.
7. Refresh the page.
8. The card is displayed.

Javascript errors shown in the web inspector (if applicable): no errors

Additional information:

type: custom:stack-in-card
mode: vertical
keep:
  background: true
  box_shadow: false
  margin: true
  outer_padding: false
  border_radius: true
cards:
  - type: entities
    entities:
      - sun.sun
    card_mod:
      style: |
        ha-card {
          --ha-card-background: red;
        }
  - type: custom:stack-in-card
    mode: horizontal
    keep:
      background: true
      box_shadow: true
      margin: false
      outer_padding: false
      border_radius: true
    cards:
      - &ref_button
        type: button
        card_mod:
          style: |
            ha-card {
              --ha-card-background: grey;
            }
      - *ref_button
      - *ref_button

[ildar170975]

Do not observe it for some last time. Gonna test it for some period, will close it if it is OK.

[ildar170975]

Closing it. Do not see problems on 2 setups (2022.7, 2022.9).