[wp-trac] [WordPress Trac] #49192: All plugin style tags are empty after upgrade to 5.3.2

[WordPress Trac]

#49192: All plugin style tags are empty after upgrade to 5.3.2
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 Reporter:  nbdcadmin          |       Owner:  (none)
     Type:  defect (bug)       |      Status:  new
 Priority:  normal             |   Milestone:  Awaiting Review
Component:  General            |     Version:  5.3.2
 Severity:  major              |  Resolution:
 Keywords:  reporter-feedback  |     Focuses:
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Comment (by SergeyBiryukov):

 Hi there, welcome to WordPress Trac! Thanks for the report.

 Replying to [ticket:49192 nbdcadmin]:
 > Strangely nothing was shown in the console which could cause it and I
 did the whole disabling plug-ins approach with no results.

 Just to clarify, does the issue still exist with all plugins disabled
 (excerpt for WooCommerce, for example, to test the styles) and a default
 theme (Twenty Twenty) activated?

 Looking at the [https://zerogravitymarketing.com/updating-to-wordpress-5-3
 -caused-admin-css-issues/ linked article], this appears to be a side
 effect of some custom code in a plugin or theme filtering the output via
 the `style_loader_tag` filter and not accounting for the changes in
 [46164] / #42804 that removed the unnecessary `type="text/css"` attributes
 from `<style>` tags.

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Ticket URL: <https://core.trac.wordpress.org/ticket/49192#comment:1>
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