Uncheck “Can Affect Navigation Generation” in Class Defaults AND Uncheck “Can Ever Affect Navigation” in all Collision of all Components of AI.
Dynamic mode generate navigation every 0.5 sec (by default in Project Settings > Navigation Mesh) so that’s why “Can Affect Navigation Generation” making this problem !
(Worked for me)
Hope it will help !
PS : Maybe it could fix FindPathToLocationSync nod…