DO_CHANGE_SPEED stops before proceeding

So. another command and another issue. I’m trying to reduce speed with command DO_CHANGE_SPEED. I start with normal nav speed 3.5m/s from waypoint 1 to waypoint 2. Then the aircraft stops in waypoint it is supposed to change speed before proceeding the mission. Anyone has experienced something like that?

Okay, it seems to work fine if I don’t add waypoint and DO_CHANGE_SPEED to the same location on the map.