So.... this is much better than the race scenario in DDAL07-1, and if you want to make Racing Dinosaurs in Port Nyanzaru!!! a thing your campaign, this is a decent start.
There's a minor issue with this as an adventure: there's a kind of weird story problem where actually being in the race seems like a silly way to actually investigate the problem posed. It doesn't really make any sense and you basically have to railroad your players into it.
But, that's not the main problem. The main problem is that the broken English of Mowbula Utakulu ("A dark skinned, beady-eyed Chultan bookie with and friendly smile") feels super-uncomfortably racist. The presented sample dialog is painfully embarrassing. (Sample: "Nay-um’s Mowbula. Yuhs look like da mob dem owls said me. Cooee close!”) And the other race teams — presumably also native Chultans — are supposed to act with the mannerisms of jungle animals.
Come on, DM's Guilld / Adventurer's League. You can do better than this!
[1 of 5 Stars!]