Quitting the transfer window: "Your Files Are Ready To Send" window quits Dropbox on Mac

I think this is new behavior....and maybe, this could be a cause of what some of us are referring to as "quiet crashes" where we notice that the dropbox app is no longer running or showing on the menu bar...on a Mac.

When I perform a transfer-a-copy of a file, and it brings up the floating "Transfer" window, and then I complete that process of confirming the file, and then choosing to copy the link, that window will continue to float in front on my mac.  Command-W does not close that window.  Also, when that window is active, and the front-most window, the computer still indicates that the Finder is the active app on the menubar.  Now, I can close that transfer window by clicking on the red "x" button in the upper left of the window, or I can press command-q on my keyboard but THAT QUITS DROPBOX!  

I think that THIS is potentially what has been problematic of lately.  I don't recall this being the behavior in the past.  Why is command-q "quitting" the transfer window causing Dropbox App on the menu bar to quit and shutdown?

As I said, when the transfer window is active, it does not indicate to the mac that it is part of dorpbox in that it does not populate the options of the mac menu system.  The active app is not Dropbox etc.

I have been using dropbox for a long time, and I do not recall this being the behavior of closing the transfer window with command-q and it shutting down the whole DropBox system.