This is reported by @ASL4U at this Lemmy Comment (I would assume they are the same person on the General Chat @ the Hub), that there are some users having the Dark Theme applying to the Preview Panel in Light Mode.

I tested it on Chrome v.118, on Windows 10 with Device Theme ‘Light’, I would have brief flash of the Dark Theme on the Preview but resolves itself.

However, there are some instances where the Dark Theme would remain like the attached image. The reporter tested it on Linux Mint 21.2 using Chrome (most up to date).

If you experience the same thing, even after changing the appropriate Device and Browser Themes (if applicable), please comment below your:

System: (Windows, Mac, Linux etc. + version e.g. Windows 10)
Browser: (Edge, Chrome, etc. + version e.g. Chrome v.118)
Device Theme: (Dark/Light)
Browser Theme (if applicable): (Dark/Light)