Bug when using Block-styles loading enhancements in WP 5.8

[wilbertalvis]

I'm not sure if this is a a bug, but when enabling this feature on Windows some of the blocks assets are not loaded on the frontend.

When checking the register_block_style_handle function, some blocks are ignored as the $is_core_block variable is false due to slash inconsistencies in the $metadata['file'] variable.

Style of blocks that are registered from register_core_block_types_from_metadata are loaded, but the blocks that are registered from their respective directory; such as register_block_core_latest_comments are not loaded.

Thank you!

[poena]

Hi @wilbertalvis
Do you know if this is still a problem in newer versions of WordPress? Please add step by step testing instructions for how to reproduce the problem.