Spawn rate activates from where the message is done

I’ve noticed that the spawn rate is activated in the area where the party is when the message is sended. But if there is movement, the area that is considered for description is mostly the arriving one.

So, if you move from an area to another, you can have a strange situation where the spawn is from the previous area, but it occurs in the arriving area.

I’m not sure how to handle/solve that. Maybe when there is movement, the spawning should trigger after the movement?