How to add/delete a new row to a grouped table in extjs 5?

Question

ExtJS/Sencha

There is a grouped table with a grouped store.
When I add an entry to the store (using the store.insert() or store.add method, it doesn't matter), the entry appears in the table, but after the entry is deleted (store.remove()), the entry is removed from the store, but remains in the grid, that is, visually the entry does not disappear, while I can no longer select it and generally work with it.