Sonoff POW 1 v2.0, parameter monitoring

[MukatP]

Sonoff POW 1 v2.0, measurement chip CSE 7759, HAA 12.11.3.
problem with measuring voltage and current.

With the help of knowledge from Github and similar, I created the MEPLHAA script:

{"c":{"io":[[[15],3],[[0],6],[[12],2],[[14,13],1],[[5], 2]],"pt":8,"w":10,"n":"Sonoff-POW v2","l":15,"b":[[0,5]]},"m": 240,"a":[{"t":1,"0":{"r":[[12]]},"1":{"r":[[12,1]]},"b ":[[0]],"es":[{"t":75,"dt":[14,13,5],"j":10,"vf":0.47093,"cf":0.01351, "pf":12.246}]}]}

I calibrated the measurements according to the instructions and entered the vf, cf, and pf coefficients.
In the Home app it only works as a switch, in HAA Home Manager and "eve" it works as a switch with measurement of power, current, voltage and energy consumed.
The problem is that it only shows power correctly. The voltage indicates the value that results from the introduced cf factor and the value is constant regardless of the load change. However, the voltage value changes as the load changes and it looks like it is calculated from Power and voltage (which is constant)..
The question is: can anything be done to make the readings correct?