Nick Foles Appears to Have Been in Illegal Formation on Awesome Trick TD Play

Nick Foles and the Eagles appear to have been lined up in illegal formation on the awesome fourth down trick play that put them up 22-12. NESN/ESPN commentator Matt Chatham diagrammed:
The fourth down trick play TS to Nick Foles was an illegal formation, should have been called back...extended WR to the top of the screen is off the ball (needs to be on the line with just the OT on inside him). #SB52 #Eagles #Patriots pic.twitter.com/tdX7hIpiGu
— Matt Chatham (@chatham58) February 5, 2018
NFL rules stipulate that you need to have seven players on the line of scrimmage, and in this grab they certainly appear to only have six.
Here is video of the play, which confirms that Foles was not on the line at the snap:
While the Patriots have benefitted from who knows how many calls or missed calls in their 18-year dynastic run, if the Eagles hold on for the victory we can expect this to be a point of conversation.