You can't control this. Load balancing will not affect scheduler which is what controls reloading. Load balancing will control repository and engine services, but when a user chooses to reload an app the repository service communicates with the central node to assign a scheduler node round-robin style to load this. We have load balancing rules set up in our environment for our apps. This is the only function of load balancing in Qlik Sense unfortunately. We have a 5 node installation and we see our apps open on the correct nodes, but any scheduler will reload them.