Set notifyDataSetChanged() on Recyclerview adapter

you are setting the new list to the RecyclerView Adapter , set the list in the Adapter:

make a method setItems(list) in adapter and call it before notifyDataSetChanged() and in adapter do

this.persons = new ArrayList<>(persons);

in setItems

add this method in adapter:

public void setItems(List<ServiceModel> persons) {
    this.persons = persons;
}

and call it before notifyDataSetChanged() like this:

adapter.setItems(list);
adapter.notifyDataSetChanged();

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