Inconsistent accels

Using firmware 4.1.1
Calibrated Cube black multiple times but still getting error “PreArm : Accels Inconsistent”
I.ve enabled Tuning checkbox on the Data Page and this is what I got from az,az2,az3
I am moving the frame in z direction

And this is when the frame is kept stable on the bench

2nd Accel Z axis values are a bit offset from the other 2 accels
Is that normal? or is the IMU bad ?

I did the Accel and Gyro temperature compensation, and that helped a lot. Try it, it might help you as well.

thank you for your suggestion