Can we disable the drag window to top of screen Mission Control / Spaces feature in El Capitan? Open Mission Control
  
  Use any of these methods to open Mission Control:
  
  ....
  
  
  In OS X El Capitan, drag a window to the top of the screen.
  


https://support.apple.com/en-us/HT204100

I'm using a window snapping/resizing app and this feature above, introduced in El Capitan, is being triggered instead. This when I snap a window to the center top of the screen. 

Is there a way to turn this feature off?
According to the Reddit thread, Is there any way to disable Mission Control coming up when I drag a window to the top of the screen?, the solution is:


  System Preferences > Mission Control
  
  Uncheck "Displays have separate Spaces" then log out and back in again.


It works, I had the same issue &amp; now it's sorted.