If your components are not showing properly there is typically a setting in your graphics card that needs to be toggled. Most often this issue arises with 3R 45’s.
Having High Quality Geometry turned on can cause issues with the display of certain components
In the 3DCONFIG command there is a setting called High quality geometry (for capable devices), if you turn that setting off and close the dialog with the OK button, your components should show properly. Below are examples with the value turned On vs Off
CADWorx Plant Professional 2014, CADWorx Plant Professional 2015, CADWorx Plant Professional 2016, CADWorx Plant Professional 2017