I've decided to have another look in the manual & it's possible that it occurred due the curb/raised bank, towards which I initially I accelerated to, before starting to turn away.
From page 441 of the manual;
If the system is activated by curbs/parking curbs or
level differences on the road and you are unable to
park or clear them, turn the system off.
It's also possible that 'Collision Mitigation Throttle Control' was invoked as described in page 443:
- Page 443
Also on page 441,it's a little worrying that it could occur on a railway crossing. How, I can't see, unless the barriers come down very quickly or the driver tries to jump the warning signs/lights;
When trapped in a railway crossing, the system may
detect the crossing gate as an obstacle and activate.
If this happens, Low Speed Brake will automatically
cancel after a certain amount of time after stopping,
so continue to move forward. If Collision Mitigation
Throttle Control is activated, continue to calmly
depress the accelerator or depress the accelerator
once again, then push aside the crossing gate.
20210416_1249.mp4
[DELIVERED JULY 2020] - 70 000Kms + 
