Nav Mesh : AI only moves in editor, not in package


I know it’s not a easy question without blueprints or pictures… My game uses 4.22.3 and i have a strange situation : my AI works (moves) fine in editor (no warning or errors), respect the nav mesh… But when i build the game : everything still works… except the AI, which does all the actions except move.

Off course, i try to rebuild the nav mesh (on static and dynamic - not necessary in my case) and geometry, try to delete the nav mesh and rebuild it.

Has anyone ever had the problem ? Or just an idea ? I will be great !

Thanks !