Hi there Vladimir! I was able to correct the issue with my NanoVNA-H white Gecko, I found out that the calibration set including the feedline cable was so horrible. The 50 Ohm load came with it is not a 50 Ohms load and is shorted as well. I tried the calibration SMA set that came with the NanoVNA-F by deepelec to the NanoVNA-H gecko and it works. The result value of my gecko is now the same as the NanoVNA-F.
NanoVNA-H V1.0.45 by Hugen79 White Gecko was updated to NanoVNA-D V1.0.53 by Dislord.
NanoVNA-F V0.2.1 by BH5HNU