RequestMemory+DstoreAdapter+FilteringSelect sort only works the first time

[gtk-aschmidt]

Let's say I have a json file with entries like this:

[
    {"label":"Locations"},
    {"label":"Clients"},
    {"label":"Vehicles"}
]

Then I create a new DstoreAdapter

this.set('store',new DstoreAdapter(new RequestMemory({
    target:'/chooser.json'
})));

Then I create a FilteringSelect with:

obj=new FilteringSelect({
    labelAttr:'label',
    searchAttr:'label'
});
obj.set('store',this.store);
obj.set('fetchProperties',{sort:[{attribute:'label'}]});

The first time you open the drop-down, the entries are in alpha order.

The second time you open the drop-down, the entries are in source order.

The simple work-around is to just sort the source file, so this is probably not a high-priority thing.