I am using Task Scheduler 2020 and have recently converted all of my old parts to Solidworks 2020. I have checked the assemblies and parts references and they all seem to be correct. When I am opening the drawing file, all the annotations are attached. However, when I am using Task Scheduler to Export the drawing to PDF, some balloons become dangling and have a (?) symbol in the PDF. It seems that only the parts located in a specific folder are the ones becoming dangling, but I have updated, rebuilt, and checked references for all the parts.