If you're at a standstill and release the brake to coast the bus, without using the accelerator, the transmission will slam into gear violently.
I have no records of any damage happening, but It's very uncomfortable for the passengers.
The sort this, you'll need to feed a little throttle, only enough to make the transmission shift up. Sometimes too little throttle is applied and the whole bus will jerk. It can feel like you've hit something.
Another silly flaw is when performing a kickdown at 3rd gear. The transmission will flare and let the engine rev at the limiter before engaging 2nd. I'll see if I can edit a few clips into a video later.