When I open the part from assembly, it looks as it should. When I go back to assembly, it shows the hole is covered with graphics tearing. I can hover my cursor to select the propeller as if the hole was never covered. I have made no changes to the part or assembly other than to bring the part to the assembly.
From a section view I can see the hole is only covered at the surface...so the rest of the cylinder is still hollow as it should be. Why is the hollow cylinder covered in assembly when the part looks perfectly fine?
You can access the assembly and file from here Solidworks doubt