When you manually open the technology screen by pressing T, the complete game including the sidebar on the right are darkened so that the technology window feels like an additional layer on top of the game (screenshot 1). This is the expected behaviour.
However, when the technology window opens because a technology has finished researching, the sidebar on the right completely overlaps the technology window (screenshot 2). You can't properly read the text in the technology window and you can't click the Research button. You have to manually close and reopen the technology window by pressing T twice.
Screenshot 1 (manually opening):
Screenshot 2 (the game automatically opens the window)
