Andrew,
Thanks for the reply! I logged a support ticket with ESRI and they have logged a defect:
BUG-000127319 : Using “Select and Zoom to Feature Geometry” on the Data Reviewer Table in ArcMap 10.7.1 selects additional features
The behavior is when a Reviewer Record is selected (in order to zoom to it and correct it), every layer in the map that has a feature with the same ObjectID also has that one feature selected. This results in the error feature 'flashing' the number of times that is the number of features selected across all layers in the map. This is not a problem if there are just ~5 layers but is a problem if the entire database is in the map. The flashing continues for several minutes.
I was not experiencing your secondary, setup issue. Not sure if that is the difference in the replies we received from ESRI.
Thanks,
Ally