I think it's because of "Interstellar mod" (in warp Plugin) in this mod - there is fuel LqdDeuterium, maybe it conflicts.
To be for sure - i deleted this mod - and all is ok.
Also mb i need to change the amount of Tanks for deuterium like this?
Or mb i can change fuel consumption somewhere in II folder?
in fact this workiing like original "II", with normal ISP.
As it were - sorry for the unnecessary anxiety. And thx for the answer.