Problems about serial ttyTHS2 with baudrate 921600

Does Orbitty Carrier Board with TX2 support the ttyTHS2 serial with baudrate 921600?
We tested and found data through ttyTHS2 with baudrate 921600 is all messed up,yet 460800 was okay.
and so did the official carrier board. Is there anything that should be modified to make it work?
I found that Redtail project with comm between tx2 and pixhawk through baudrate 921600 seems to work in their wiki, so i am confused about it.

If your attached device can support two stop bits, then this will probably work around issues.

thanks. i will try. currently i will use usb port instead.