Any fix for this yet? I've got the same issue and it also seems to be slowing my game down a bunch. It's a shame because it otherwise makes my game look a whole lot nicer!
A solution I found to this issue was to enable FX at runtime, this means your scene view is not cluttered and then disable it when you stop running the game. Another solution is to enable it before you build the game as you may not need the effect on when in editor. For the slowing down it seems like the certain effects affect the performance, I am pretty sure this inevitable as certain screen FX take a lot of processing power in general unfortunately.