I prefer using Scripting object for writing, and I also had an idea to write an explicit NewLine to my string, but in mean time problem was solved and it was not software-related,

Problem I was trying to solve were missing data during label printing. Since I have found a difference in text-output on my and another PC, I supposed that that caused the problem.
But the solution was trivial: printer ribbon was partially not in place.

Thanks for your answer anyway.
regards