FileMaker Pro Advanced 16.0.4 and 17.0.2
macOS 10.13 & Windows 10
iMac (Retina 5K, 27-inch, Late 2014)
Theme Enlightened and Sophisticated (at least)
If an outer shadow without blur is set on Edit Boxes when their state is In Focus, after exited, a bit of the shadow remains visible above the field until the the entire window is refreshed :
How to replicate ?
Use the file attached and see how when exiting the first Edit Box left a dirty shadow. This does not happen with the second Edit Box since i additionally set a blur of 1 point.
Set a blur of 1 point.