Paging Toolbar doesn't work when grid's store is declared as type. Is this a bug?

In ExtJS 2, 3, and 4 when I wrote a grid I was declarng grid's store like this:

Code:

---

store: 'storeID'

---

or

Code:

---

store: theStore

---

. However In ExtJS 5.1 it says that store is not found. Thus, in ExtJS 5.1 I write in this way:

Code:

---

store: { type: 'contactsStore' }

---

, and it works. However then paging toolbar doesn't work properly; like when I add or delete or modify an entry I had to run

Code:

---

Ext.getCmp('ContactsPaging').doRefresh();

---

so that it shows the correct number of entries but this time it rises another problem; the app makes two GET requests from the server, one for refreshing the grid (

Code:

---

Ext.getCmp('theGrid').getStore().load();

---

) and one to refresh the paging toolbar (

Code:

---

Ext.getCmp('ContactsPaging').doRefresh();

---

).



Shouldn't paging toolbar automatically render itself when I add or delete a entry from the store?

Paging Toolbar doesn't work when grid's store is declared as type. Is this a bug?