Why does El Capitan keep resizing my Finder window?
I recently upgraded my iMac to El Capitan, and I've noticed that my Finder window (which I keep open all the time on a connected Thunderbolt display) keeps resizing to the height of the entire screen. I keep it in the bottom right corner, so it will extend itself off the screen. I'm constantly having to resize it to get at files that are out of view. Any idea why this might be happening, or how I can prevent it?
iMac (27-inch, Late 2013), OS X El Capitan (10.11.1)