I don’t recommend the Bird for pump track use, this is the result of me riding like I was young again on a bmx.
Might have been the speed, might have been the damp, might have been the tyres (definitely the tyres btw) might have been laying it too flat too low in the berm but I have a sneaky suspicion it was the Bird.
You can have fun on anything when riding a pump track but something shorter, stiffer and with fast rolling tyres will always be better.
FWIW I rode the pump track at FOD on my Primal hardtail with 29” wheels and 160mm forks, it was terrible, but rather than buy another bike I just didn’t ride it again so there’s other ways around the problem.