Samsung S6-Lite tablet running Android 10.
Dialog boxes such as Configure are hard to use because: a) no edges on the window makes it difficult to tell what is foreground and what background, b) the [ok], [Cancel] buttons are frequently off screen.
Happens with 4.4.2 and 5.0.0 pre alpha, though the arrangement is a little different. The work around is to rotate tablet between Portrait and Landscape mode and/or use menu View > Full screen. I sometimes need to alternate among them a few times to get the working combination.
Not in the screenshots is the System navigation bar (Recent apps, Home, Back) which takes up about 3% of the display, and is likely covering the missing controls when in Landscape mode, as well as the single button full screen toggle.