I think I found my problem. Every time I create a certain map entity, the nexus goes up a bit. I can't believe I did not notice this.

I use ent_purge when removing the entity, but this does not seem to reduce the nexus. When it is created again, the nexus goes back further each time.

I think by using a model, instead of a map entity, this problem will be solved.

Or maybe there is a way to reduce the nexus when removing a map entity, so it will not build up?