Wall ride to rail grind to wall ride

This goal is driving me nuts. I have - without a doubt - completed it twice now. And neither time has it given me credit for it. It's extremely annoying. The first time it was a balloon grind, so I assumed that just didn't count. But the second time was in the Lost City and was absolutely what the goal was asking for.

I'm going insane. I found this thread about it but it didn't really help... https://www.reddit.com/r/AltosOdyssey/s/R297ivm1MY