How active a NPC behavior of a pawn if I unpossess him?

[unit23]

Answer to problem with Actor freeze in air on unpossess.

Why does an unpossessed Character stops movement?

The problem with the last listed solution is that it will still slightly pause the movement. Say, if your character is falling and you do this; they’ll pause for a second in the air and then begin falling again. I’ve found an even more elegant solution to this problem. There’s a Boolean in the CharacterMovement component called ‘Run Physics No Controller’, by setting this to True it will solve the problem.