Hi Krzysiek_TATE,
Thank you for the sample project that you provided. That got me started in the right direction, and I believe I am now able to reliably create a test project that shows the issue that you are still having. I have some additional tests that I want to run on this in the morning, but it looks like this may have already been corrected in our latest internal version of the Engine. I want to see if I can track down when this was corrected.