Image Effects Blur on iOS adding brightness?

I’m wanting to blur the world when I put up a pause menu, and so I added in the Blur effect from the Image Effects standard package. It looks great when I test it on my computer, but when I test it on my iPhone 5, I get not only the expected blurring, but the whole scene is much brighter, almost white. Where is this extra brightness coming from? There’s no settings in the blur script to modify brightness.

How do I get the same look on both Mac and iOS with this Blur effect?

found the answer over here: