Initialization time for mpu-6000

Hello,

I am using your mpu-6000 and 6 axis sensor fusion library. All data can be read correctly. But I find that the initalization time is too long for the data after sensor fusion, just as the gravity and the euler angles. Each time I restart the board, there is an error of about 2 degrees in the euler angle. And this error can stay for more than 10 seconds and then the angle return to the real value itself. Is there a solution for this issue? Thank you in advance.

Regards,
Yijun