So I asked my husband who totally does NOT get this OUaT “stuff” to re-watch the scene and tell me if he notices anything about the vault. He asked me what the box that lights up and blinks is supposed to mean. I then went back and watched all the scenes with the heart vaults from the Heart Is a Lonely Hunter. There are boxes that have reflections as you can see from the screen shots but they are totally different from the one box in Wonderland. The box in Wonderland has a yellow/golden color to it, the other ones are just bright like a sun or light reflection.
It could be nothing, but it seems very odd that they wouldn’t have done something to edit it out if it wasn’t supposed to be there. It’s actually so distracting to me that I watch the box light up instead of watch what EQ is doing. Plus there seems to be a sound that happens at the exact same time that the box first flashes.
I can’t actually tell if it is Graham’s heart box though. At first I thought it wasn’t because it looked like it was on the end in Wonderland and Graham’s box isn’t on the end. But on the screen shot it looks like there might be more boxes to the right.