Nope, not solved.
Cos when it gets to the end of that short bit of track it has to reverse back.
And when it's doing that it's pushing.
See
https://www.youtube.com/watch?v=GmTkjQPZlh0
and end of
https://www.youtube.com/watch?v=NGibEDopnMA
combined with earlier
https://www.youtube.com/watch?v=v_MLpJQswF4
