"Connection Lost" Dialog - Is It Really Necessary?

Is it really necessary during flight to blur the screen and stick a “Connection Lost” dialog in the middle requiring user interaction to clear it, unblur the screen and get back to being able to control your aircraft properly without hindrance???

A simple overlay that pops up at the top or bottom of the screen for a few seconds would suffice rather than something that blocks your vision at a possible critical phase of flight.