Fix comments not loading

Signed-off-by: ZetaTom <70907959+ZetaTom@users.noreply.github.com>

app/src/main/java/com/owncloud/android/ui/fragment/FileDetailActivitiesFragment.java

@@ -147,6 +147,7 @@ public class FileDetailActivitiesFragment extends Fragment implements
         viewThemeUtils.androidx.themeSwipeRefreshLayout(binding.swipeContainingEmpty);
         viewThemeUtils.androidx.themeSwipeRefreshLayout(binding.swipeContainingList);
 
+        isLoadingActivities = true;
         fetchAndSetData(-1);
 
         binding.swipeContainingList.setOnRefreshListener(() -> {