Hi, the exact same thing happened to me yesterday, and again today! I have a score of 1,203,360 on the challenge: Katoomba, Australia and earned a 1,494,132 and the score never updated in my standings.
I rebooted and tried again, and earned a 1,484,???, and again nothing! Today, I tried again thinking yesterday’s fiasco was a fluke, and I earned 1,222,???, and again-the same garbage. This is certainly frustrating. And what’s even more frustrating is that according to this thread, it’s been going on for a long time, and nothings been done to correct it.
Mario
PS
MS Store Version; Regular mode; 0 Mods; Intel & Nvidia high end machine; Latest build version; This landing challenge only so far; Happens several times and not only with first breaking of personal best.
PS Again
Just happened to me again today in the: Toronto Challenge