Looks like it ended up in griffin's friends couch
Maybe its not just about whether or not the Magical Christmas Tree Bauble is in one's posession or not, but the actual thoughts and feelings of the person at the time? If the Matrix senses the wielder truly doesn't want to be in that position, it doesn't grant the wielder its powers?
Well I'd like to think that Optimus' spirit was still making its way into the Matrix at this point since he'd literally JUST keeled over in a matter of minutes/hours before.