(Assuming the ball was snapped with Team A in this formation) We all recognize that there are, indeed, 5 offensive players in the backfield, and a foul would, I believe, have been supported by the coordinator.
However, on the presumption that the right ‘end’ in this formation was, undoubtedly, wearing a number 50 thru 79, there should have been no confusion on the part of Team B as to which players of Team A were eligible. Indeed, the eligible players appear to be covered by appropriate opponents, and there is no linebacker or defensive back paying attention to the ineligible end. Other than, possibly, a slightly greater initial separation between the right flanker and the cornerback - which can be a significant difference with this level of players - there is no advantage gained by Team A. So, passing on this call, if consciously done, can be understood, and, perhaps, not downgraded (if not fully supported).
I have a feeling the CB would have been that far off the flanker, even the flanker had been the end. The other corner is a nearly identical distance off of his end. If they are coached for maximum ‘press,’ the other corner would have been at least a step forward - roughly in line with the corner over the flanker. But he wasn’t. So, I’d say the corners were where they would have been (off the receiver) regardless if the receivers were on or off the line.
I’d be more concerned if this was just missed, rather than consciously ‘passed’ by the wing. But, I doubt we’ll ever know.