Storyline 2 - 360 Markers Issue
I had some SL2 files with markers in them. When I upgraded them to Storyline 360 and viewed them in Review, stranger things happened. The marker headline and text was not visible, it was black on black.
I checked the source, and it was set to Black on White. Review showed Black on Black.
Finally, I set the background for the text black in SL 360 and the magic happened. In the source, it was white (even if I set it to black). And the published version worked as white as well.
As a test, setting the background color for the marker text to white actually causes the background to be black...
If you're having similar issues, check the background color for the marker.