AFE4300EVM-PDK: I/Q mode result error

Hello,

I'm using AFE4300EVM, and I plan to use AFE4300 on my custom board.

I want to calibrate it in FWR, I/Q mode.

So in FWR mode, It works very well.

I got slope and offset of FWR, and now I'm in trouble with I/Q mode.

I/Q mode's results can't be repeat.

I measured same set of R-C series, but It always answered different ADC code.

It can be solved by only reset in GUI, but sometimes it didn't works too.

I/Q mode's magnitude get lower error, but its phase is obviously wrong, and changes everytime.

Is it my problem or AFE4300EVM's problem?

And also AFE4300 got the same problem?

Thank you.