I am using OS X Mojave 10.14.3 and Omni Outliner 5.4.1 (v194.5 r321924).
When OS X switches to Dark Mode in the evening, while the rest of OO’s interface looks OK, it seems that the “Sections” area of the side bar goes to an unreadable white-text-on-white-background configuration. This problem does not affect the “Styles” area when that is selected instead.
Please see the attached screen capture for comparison. Is this a bug or am I missing a configuration setting somewhere?
(I would post a 2nd screenshow showing the correctly-visible “Styles” area in the same document but the forum only allows “new users” (?? my Omnigroup forums account is years old and has multiple posts) to post one attachment per topic.)