Opening a Mac-made Scrivener 3 project on the Windows beta appears to work well, but if you go into composition mode the text is dark, and appears to have a dark color that does not get inverted when the background goes dark in this mode. In the normal editor it looks just fine. Doing “Remove style” on the text fixes the issue, but redefining the style on a Mac and then reopening on Windows causes the issue to return.
Screenshots shows the same text in editor and comp. mode, demonstrating the issue.