What?

It seems that when transforming a block the metadata attribute is not preserved. For example, if I name a paragraph block with a custom name, it disappears after transforming it into a heading. Or if it has some bindings.

It seems it works fine with other attributes.

Is this expected? If not, any idea how it could be solved?

Reproduce

1. Add a paragraph to a post.
2. Rename the block to "Custom name".
3. Transform the paragraph block into a heading block.
4. Check that the "Custom name" has dissapeared.