I would honestly be interested about where you got that the transponder is based on movement vs position. And I don’t say that to catch you in a lie at all I am thoroughly honestly interested in this and would like to learn more about this tech.
edit: and yes from the in-board cam it does look like at least the contact patch was in-front you are right.
…Just says there’s a transponder that’s supposed to judge if there was movement. It says nothing about how said transponder achieves that judgement. It doesn’t simply senses movement as you astutely pointed out the car very obviously moved. That means it needs a reference point.
So Is it gps? Is it an accelerometer? Is there another sensor on the grid it has to cross? Is it telemetry? Why is there this much wiggle room?