Did you try lowering the game resolution, or switching display mode, to see if that would make a difference?
Please email supportdos@larian.com, with a description of the problem and the report.zip file generated by the
D:OS support tool (for the PC version). The report will contain system and game information, any crash dumps, and your saved games (which do not appear to be relevant, so can be deleted from the zip to reduce file size).