How To Fix Spectral Flatness Result No Data Issue

When you measure the NR spectral flatness by RFmx NR , you will see that there are no data for some spectral flatness results.
For example , RFmx Waveform Creator generate one NR signal (CF:2.6GHz , BW:20MHz), then RFmx NR show below result with default setting :

RFmx can demodulate the signal well , but there is no data for spectral flatness.
Is it an expected result ?  How could you fix the issue ?

1.Find NR bands table , you can know 2.6GHz is located in NR band 38; 
2.Check the default setting of RFmx NR, the Band was 78.

Change the value of Band as 38 , then you can see that spectral flatness of Range1 show data as below picture :

About Spectral Flatness Range2 still no data issue , you can refer to the protocol , like below

You can calculate the frequency range about  Spectral Flatness Range1 as 2573MHz!~2617MHz ,Spectral Flatness Range2 as (2617~2620) and (2570~2573) MHz.  The signal is located in frequency range from 2590MHz ~ 2610MHz.  So there is one signal located in Range1 , but there is no signal located in Range2 part, so Range2 no data was an expected result.