Der Eisendrache back in time alone?

https://www.youtube.com/watch?v=tTrT0bIsWxk&ab_channel=AxY-

at 13:55 in this video a player runs over as symbol on the wall after all 4 wisps have been shot and goes back in time alone. I have never seen this before. Is there some trick to this or does that symbol send you back in time?