Collision - can character step up on

Created a movable static mesh box for VR with HTC Vive, where the pawn can step up.
Initially it’s working fine, so we can step up several boxes e.g. for reaching a new way or to find something…

But after moving the box in game mode, we can no longer step up on this box and we will walk in this box, although pawn and box is set to adjust location and don’t spawn.

Searched for an option like rebuild in game but didn’t found something helpful.

Does anybody know why it isn’t working after moving the object?

Kind regards

Thought we can gain some performance by individual adjusting movable objects; but it seems easiest way is via project settings – navigation.