A colleague sussed it out. In the Issue Settings you can choose to only the current issue back to only a certain issue or only the current issue. The Change Markers that were "hiding" their polygon lines were from a previous issue and the Issue Settings were set to show only the current issue.
AC versions 3.41 to 25 (UKI Full 5005).
Using AC25 5005 UKI FULL
Mac OSX 10.15.7 (19G2021) Mac Pro-2013 32gbRam AMD FirePro D500 3072 MB graphics