Good day @BIS!
In editor, inside settings of any waypoint the "Completion Radius" not will works properly for npc units. It always will just be ignored!
The Bohemia Interactive forum description says that Completion Radius is "Distance in meters in which a group member has to be in order for the waypoint to be considered completed."
But in fact this is a hoax, because it will work only for the players, but not for other units. In fact, here the player will face a real disaster, because any waypoint with any completion radius will not work for any AI waypoints! In order for an AI unit to complete a waypoint, it always needs to reach the actual waypoint position placed in editor, while the setting will be ignored.
Please fix this bug , this creates many SP mission problems for both mission creators and users of other people's missions...