add_editor_style now copying html styles to .editor-styles-wrapper?

I had a look at the code history in the Gutenberg repository, and it looks like html and body have been transformed since the very beginning, 5 years ago:

https://github.com/WordPress/gutenberg/blame/15fc0c13eb33a6e4426ff4ad681b6bfb6d0adaec/packages/editor/src/editor-styles/transforms/wrap.js

:root was added several months later.

So yes, it appears to be intentional, but not new. If something has changed in your styles in 6.3 it must be something else. I can’t see any meaningful change in how this feature has been implemented since it was introduced.

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