I have a group of fields as a separate field group and use it by using the clone field to import it. The field group includes conditional logic.
When I include it on one site twice (or more), once by simply cloning it, once by a repeater field, the conditional logic of the normal clone stops working. The logic in the repeater field works just fine.
The bug only apears on ACF Pro version 5.6.6 and later. 5.6.5 is working just fine.