The follows is described in ADXL346 datasheet.
"Writing to the BW_RATE(Address 0x2C) or placing the part into standby mode rests the orientation feature, clearing the orientation filter and the orientation status."
I investigated whether Orient register is cleared or not .
In the case of setting BW_RATE=0x00 and standby mode,Orient register was cleared.
But in the case of setting excpt BW_RATE=0x00 ,Orient register was not cleared.
In addtion, when Overrun bit is set, Orient register is updated every time interrupt generates.
Is it happen like the above event?