This issue is related to appearance setting inside Chrome itself (which sets Chrome's appearance, not how it should work with websites AFAIK). The core feature of prefers-color-scheme (following the OS-level setting) is working as intended.
It is not true that prefers-color-scheme should always follow the OS-level setting. The doc says "The method by which the user expresses their preference can vary. It might be a system-wide setting exposed by the Operating System, or a setting controlled by the user agent."[1]
So if the user sets dark mode in the browser, do they not explicitly express their preference for websites? How could they be more explicit about the setting?
It is not true that prefers-color-scheme should always follow the OS-level setting. The doc says "The method by which the user expresses their preference can vary. It might be a system-wide setting exposed by the Operating System, or a setting controlled by the user agent."[1]
So if the user sets dark mode in the browser, do they not explicitly express their preference for websites? How could they be more explicit about the setting?
[1]https://drafts.csswg.org/mediaqueries-5/#prefers-color-schem...