One of the races on WCS called "Sargent Gunner" is bugged. The ultimate "Hawk Eye" Don't work. I hope you can fix the problems, cause the race is awesome and if the ultimate had worked to, it would be even nicer.
It might not be bugged aswell. Mark could have disabled the ultimate for reasons like too overpowered, something wrong with the ultimate or makes the server crash etc. There could ble plenty of reasons.