expss tab_sort_* 当 tab_row_labels() 出现时，行为不符合预期

如何解决expss tab_sort_* 当 tab_row_labels() 出现时，行为不符合预期

下面的expss脚本。不使用 tab_sort_asc() 运行，然后使用它。[最后几行]。 tab_row_labels 得到排序。如何防止这种情况发生？

mtcars %>%
  #####################################
  tab_row_label("Additional labels1 - means of numeric variable") %>%
  tab_cols(total(),vs) %>% 
  tab_cells(mpg) %>% #Numeric
  tab_stat_mean()%>%
  tab_stat_valid_n() %>%
  #####################################
  tab_subgroup(gear>3) %>% 
  tab_row_label("") %>% 
  tab_row_label("Additional labels2 - filtered for gears > 3") %>%
  tab_cells(vs,am) %>% # Categorical
  tab_stat_cpct(total_row_position = "above",total_label = c(" N"," Row %"," Col %"),total_statistic = c("u_cases","u_rpct")) %>%
  ####################################
#tab_pivot()

tab_pivot() %>% 
  tab_sort_asc()