In my prior experience, I never came across this issue and now that I have retired I only have an older version of Visio to work with but, I did go back and try to resolve the issue with no apparent (quick) solution using the 'Organization Chart Shapes'. However, I have found that using the a rectangle graphic from the basic shapes stencil works just as well and does not cause a placeholder under the name. Maybe this will work just as well for your particular project.