As I'm a novice with the Greek Construct functionality, I fully realize that this may not be a bug, but what I typically do is compare what I see in the Windows version with what I see in the Mac version and if there's a difference, I tentatively conclude that the problem lies with the Windows version. On to the bug...
I had double-clicked on the 'Lex' column in the screen shot, and entered two Greek words, but when I hit the 'Search' button, I got an error dialog about needing an '@' symbol. I figured it was because I was 'missing' opening and closing parentheses, so I manually put those in and it worked. I then went to the Mac version and it just worked: no error dialog, no need to put in opening and closing parentheses:
Greek Construct Discrepancy.png 52.17KB 0 downloads