Hey DarkKris3 and fabianoberlim -
I have been working to recreate this error because I see your screenshots and I know that you are having a very annoying bug, but I’ve had no luck as of yet. I would say that it is a Video Card related issue, but both of you have different video cards and different drivers.
At this point I have to ask if either of you are willing to share an entire level including assets which demonstrate this error so I can start doing testing with a level we know generates the issue.
If you can please let me know I would need the Config, content subfolders and the *.uproject file. Depending on the size and how private you want the level to be please feel free to PM in the forums.
Thank You
Eric Ketchum