KRpano tools 19pr4 reduces detail?

Hi all!

For example, nativ pics are cubefaces 1909x1909 (equi 6000x3000).
18.3 generate 3-levels multiresolution 1910x1910, 956x956 and 512x512.
19pr4 generate only 2-levels multiresolution 1792x1792 and 1024x1024.
This means that the maximum resolution of 19pr4 is significantly less than the nativ resolution of original files.
Why is there a degradation of image quality in 19pr4?

I used default settings in both cases.
levels=auto
maxsize=auto
maxcubesize=auto

What else do I need to check?

Other example:
cubefaces 3501x3501
19pr4 generate 3584x3584 1792x1792 768x768
18.3 generate 3502x3502 1752x1752 876x876
3584x3584 is significant more than nativ pics... But added one additional interpolation, which doesn't enhance the image quality :(((

Yes, you are right, "levels = 3" can be a solution for the particular case 6000x3000. I get 1910x1910, 1024x1024 and 512x512.
But I have the panoramas with different image resolution. "levels = 3" is not enough for equi 14.000x7.000. In this case, I need 4-levels multiresolution as minimum.
I think, every time to edit the configuration file manually is not a good idea. How to return the algorithm which correctly worked in 18.3 to the current version 19pr4?

I don't see the differences in the multires.config files in 18.3 and 19pr4. But I see the different results. So, I think that the bug is in a different place. Maybe I'm wrong.
I hope that Klaus will tell the solution to this problem.

PS
Timescale, thank you very much for attention to my problem