IF : itemframe | iif : invisible itemframe

So basically, I was doing some stuff with the new snapshot, and wanted to use some iif. I summon an iif, put a whool on it and place a button right behind it. And I've seen that was not as usual with normal IF. Just to give you an example, here is a before/after torch with a hook attached.

The problem is the iif makes the item in it 1 block pixel backward as a normal IF. I got other screens attached to make this bug easier to see than with the first screen.

Could probably be added a tag to customize the position of the item in the IF.