I created a custom post type: Projects
With a custom taxonomy linked to it named: location_group
It is linked by a relational taxonomy select field. When I create a new project and assign it a location_group taxonomy through the acf field it doesnt get added to the taxonomy list. So when I go to the taxonomy list the selected term is still empty even though it is selected. However when I add it through the taxonomy meta box on the side it does get added.
Edit: Just noticed if I create a relational taxonomy field for just basic categories it also does not link up.
Edit2: Using a normal post rather than custom does not link up either.