Custom block styles cause a crash for nested block containers

[kjellr]

Describe the bug

Assigning a custom block style to a nested block container (like the Media & Text or Columns block), causes a crash when you attempt to open the styles panel.

To Reproduce

1. Register a custom block style, targeting core/media-text or core/columns
2. In the editor, select the type of block you attempted to style.
3. Attempt to open the block switcher, and observe the crash.
4. In the sidebar, attempt to open the "Styles" panel and observe the crash.

Expected behavior

These should be able to accept block styles just like any other block.

Screenshots

[kjellr]

It'd be great to get this sorted out before #13822 is merged in, otherwise I imagine any block styles for the cover image block will trigger crashes as well.

[kjellr]

Looks like this has already been filed here: #9897

Closing this as a duplicate.