IWR1642: False detection when using profile_advanced_subframe.cfg in SDK2.0

Hi team,

My customer is testing advanced_subframe base on IWR1642 SDK2.0.

The cfg file is from C:\ti\mmwave_sdk_02_00_00_04\packages\ti\demo\xwr16xx\mmw\profiles\profile_advanced_subframe.cfg

Everything is default.

As the picture shown below, when running this demo, the plot always has some false detection at the end of each sub frame. 

How to avoid this false detection in this advanced sub frame setting?

Thanks.

Regards,

Wesley