Calendar event description is hardly visible - black font on dark grey background. Default Theme issue

After 158.0.1 update the colors are broken when I open a calendar event (in a popup or tab) in edit mode the description has dark background with black font which is very hard to read. I have Dark Mode in windows and this issue is in both Auto and Dark themes in Thunderbird. No matter what theme I install apart from Light the description in unreadable.