Disable query observing when synchronising to avoid view flickering

app/src/main/java/com/readrops/app/itemslist/MainActivity.java

@@ -631,6 +631,8 @@ public class MainActivity extends AppCompatActivity implements SwipeRefreshLayou
 
                     @Override
                     public void onComplete() {
+                        viewModel.invalidate();
+
                         if (viewModel.isAccountLocal() && feedNb > 0) {
                             if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N)
                                 binding.syncProgressBar.setProgress(100, true);

app/src/main/java/com/readrops/app/itemslist/MainViewModel.java

@@ -125,6 +125,7 @@ public class MainViewModel extends ViewModel {
     }
 
     public Observable<Feed> sync(List<Feed> feeds) {
+        itemsWithFeed.removeSource(lastFetch);
         return repository.sync(feeds);
     }