ADXL372 FIFO data error with long time reading

Hello,

I am using the adxl372 to measure the x,y,z acc data, the initialization is normal.

and i get the data through the FIFO, here comes the problem.

I set FIFO samples num as 480 (0xE0,160 samples for each axis),set the watermark interrupt, in the interrupt callback function,

I read the FIFO data through SPI.(read 157 samples each time)

Everything is fine in the begining, but a little moment later, the data goes wrong, and then three axes data begin to swap. 

As the picture shows below,

I don't know why this comes like this, the data swaps every time i read the fifo(157 samples).

Best regards.

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