IWR1443BOOST: LEVEL SENSE DEMO SPI TRANSFER ERROR

Dear People;

We have following hardware for experimenting level sense demo;

IWR1443 BOOST REVA 

MSP442 P401 R LAUCH PAD

When we setup the demo with only IWR1443 BOOST using CCS debug and suggested breakpoints, we can observe a proper measurement.

Unfortunately, when we setup the demo using  IWR1443 BOOST and MSP442 P401 R, we are observing unrelated large negative values as seen below. We think something is wrong with SPI communication or data formats are not compatible.

IWR1443 Data:
Dist 0.000000(m), power -2010782840
Dist -0.000000(m), power -2020619475
Dist 0.000000(m), power 21485522
>s
Start one-shot measurement

IWR1443 Data:
Dist -0.000000(m), power -2009998394
Dist 8823339008.000000(m), power -2064119595
Dist -0.000000(m), power 1129220456
>s
Start one-shot measurement

IWR1443 Data:
Dist 133296.125000(m), power 1672510792
Dist 0.000000(m), power -1570628998
Dist 133995.515625(m), power 560239536

Any idea what goes wrong?

Regards,