We've had similar issues reported over the years, and time and time and time and time again, they are graphics driver bugs. They are by far the #1 cause of crashes and visual glitches in C2. Driver bugs can happen in the latest available versions and can be effectively random in how they occur.
It is not reasonable or practical for us to fix driver issues, so there is nothing much we can do about this.
There is a small chance it could be a bug in C2 itself, but it renders correctly for me, which makes it seem very unlikely. If the bug was in C2 itself I should be able to see it.