@NothingIsLost Awesome plugin, 10/10. Came across what I think is a bug. Gif below shows the theme (solarized light) unapplied in preview mode but applied in edit mode.
My guess is that it’s probably caused by code block makers (```) in the markdown file having spaces to the left (highlighted with blue circle):
Notice that obsidian’s default code syntax highlighting renders just fine in Preview mode (default code theme is grey background one as seen in the .gif)