View #215 on GitHub to know more details
In the previous versions, the dark theme would render the calendar view black (or dark gray) but as of v2.37, the calendar view remains white regardless of the theme used.
@jeed2424 - This issue has been resolved and is already available in Web version of JA. You would start seeing this change in extension after you are upgraded to JA v2.44.
Hence closing this issue considering it is resolved now.