[wp-trac] [WordPress Trac] #65272: Blocks' opinionated styles are not loading on demand in classic themes (was: Twenty Fifteen: Quote block border is on the left when text is aligned right)

[WordPress Trac]

#65272: Blocks' opinionated styles are not loading on demand in classic themes
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 Reporter:  nidhidhandhukiya  |       Owner:  (none)
     Type:  defect (bug)      |      Status:  new
 Priority:  normal            |   Milestone:  7.0.1
Component:  Script Loader     |     Version:  trunk
 Severity:  normal            |  Resolution:
 Keywords:                    |     Focuses:
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Changes (by sabernhardt):

 * component:  Bundled Theme => Script Loader
 * version:   => trunk
 * milestone:  7.1 => 7.0.1


Comment:

 This bug is new to 7.0, but not with the theme(s).

 The Quote block border issue can happen in Twenty Fifteen and Twenty
 Nineteen. However, the `theme.css` for individual blocks such as Quote,
 Search, etc., are not loading.

 I can temporarily correct the behavior by
 1. adding `wp_load_classic_theme_block_styles_on_demand` on the `init`
 action, as it was before [61981], or
 2. disabling the `should_load_separate_core_block_assets` filter and
 loading the full `wp-block-library-theme` stylesheet.

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Ticket URL: <https://core.trac.wordpress.org/ticket/65272#comment:4>
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