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reading from ADXL362 FIFO

Can anyone explain why the data I'm seeing from reading the FIFO is different than the data I'm seeing when reading the 12 bit X, Y, Z registers? I have my ADXL362 fixed in a static position and I'm seeing huge swings on consecutive reads when I read the FIFO. For example I'm seeing my x, y, z go from (0.243, -0.121, 1.262) -> (-0.249, 0.115, 1.251). That's a 0.5g swing in the X axis and the device is stationary. When I read from the X, Y, Z registers my data is very stable. Has anyone encountered this behavior?

Thanks,

~Serge