Fails with no error if crossing by a column containing only "label"

[DanChaltiel]

library(dplyr)
library(crosstable)
mtcars2 %>% mutate(x="label") %>% crosstable(am, by=x)
#> # A tibble: 2 x 3
#>   .id   label        variable
#>   <chr> <chr>        <chr>   
#> 1 am    Transmission auto    
#> 2 am    Transmission manual
mtcars2 %>% mutate(x="lab") %>% crosstable(am, by=x)
#> # A tibble: 2 x 4
#>   .id   label        variable lab        
#>   <chr> <chr>        <chr>    <chr>      
#> 1 am    Transmission auto     19 (59.38%)
#> 2 am    Transmission manual   13 (40.62%)

^{Created on 2024-03-28 with reprex v2.1.0}