Adobe Framemaker 2015...Random block dots in pdf

I work in Framemaker 2015. When I convert a document to pdf, some of the insertion points come across to pdf as tiny black dots. These only show up in the pdf document, not the FM file. Does anyone have a suggestion on how to get rid of this? Right now I can highlight each point and change it to plain text to get rid of it, but if there is nothing there in FM it gets frustrating to have to randomly get rid of black dots that might show up in the pdf. Any suggestions would be appreciated.