I don’t think this happens on Windows 10, but on Windows 11 when the Greenshot icon is in the hidden icon menu, selecting capture region begins the capture process but the hidden icon menu does not disappear and remains open, which blocks that part of the screen and ends up getting captured hiding the screen behind it.

There is a work around right now, by allowing the Greenshot icon to not be hidden when a capture is needed for that part of the screen. It’s a pain, but it works. Anyway, I just wanted to let you know and if it can be fixed. Great!