artifacts in full screen mode (dark theme)

Hello, I am testing Scrivener, and loving it so far. One thing I found, if I go into fullscreen mode (F11) and set ‘background fade’ so that the desktop is invisible, then wait for the bottom toolbar to disappear: it will leave artifacts, that is, lines, the color of which depend on the window behind it. The vertical scrollbar that appears has the same issues.

For example, the lower right corner of the screen will look like this:

I am running scrivener 3.0.0 on Windows 10, using the Dark theme.