I mean, you could also just switch the AI_Controller from the detour one. Then, the characters won’t path around each other smoothly, however, the navmesh will still be altered if it is told to do so by blocking volumes and so your problem would still exist.
I am curious, though, if you’re just using the word “detour” and not meaning “Detour” (capital D), because if it’s lowercase d “detour” it would just be navmesh stuff, “Detour” is a mechanic specific to the AI_DetourController…
Regardless, if you replace it with anything that will navigate the space, you will run into this issue if it’s a Navmesh thing. It has to do with collision volumes, not whether or not it’s a character. 