input validator does not work properly with input-group

The first input in the input-group is not validated on the ui level (but iv$is_valid() works properly).

app

library(shiny)
library(shinyvalidate)

is_dateish <- function(x) {
  tryCatch(
    expr = {
      as.Date(x)
      return(T)
    },
    error = function(e) return(F)
  )
}

shinyApp(
  ui = fluidPage(
    tags$div(
      id = "dmenu",
      class = "form-group shiny-input-container",
      tags$label(class = "control-label", `for` = "ifrom", "Date Range"),
      tags$div(
        id = "igroup",
        class = "input-group",
        tags$input(id = "ifrom", type = "text", class = "form-control", value = "", style = "text-align: center;", autocomplete="off"),
        tags$span(
          class = "input-group-addon input-group-prepend input-group-append",
          tags$span(class = "input-group-text", icon("arrow-right"))
        ),
        tags$input(id = "ito", type = "text", class = "form-control", value = "", style = "text-align: center;", autocomplete="off")
      )
    ),
    verbatimTextOutput("is_valid")
  ),
  server = function(input, output, session) {
    iv <- InputValidator$new()
    iv$add_rule("ifrom", sv_required("'From' required"))
    iv$add_rule("ito", sv_required("'To' required"))
    iv$add_rule("ifrom", compose_rules( ~ if (!is_dateish(.)) "'From' must be a date"))
    iv$add_rule("ito", compose_rules( ~ if (!is_dateish(.)) "'To' must be a date"))
    iv$enable()

    output$is_valid <- renderPrint(iv$is_valid())
  }
)

session info

─ Session info ──────────────────────────────────────────────────────────────────────────────────────────
 setting  value                       
 version  R version 4.0.2 (2020-06-22)
 os       Ubuntu 18.04.6 LTS          
 system   x86_64, linux-gnu           
 ui       RStudio                     
 language (EN)                        
 collate  C.UTF-8                     
 ctype    C.UTF-8                     
 tz       Etc/UTC                     
 date     2021-09-21                  

─ Packages ──────────────────────────────────────────────────────────────────────────────────────────────
 ! package       * version date       lib source        
 P assertthat      0.2.1   2019-03-21 [?] CRAN (R 4.0.2)
 P bslib           0.2.4   2021-01-25 [?] CRAN (R 4.0.2)
 P cachem          1.0.6   2021-08-19 [?] CRAN (R 4.0.2)
 P cli             2.1.0   2020-10-12 [?] CRAN (R 4.0.2)
 P crayon          1.3.4   2017-09-16 [?] CRAN (R 4.0.2)
 P digest          0.6.25  2020-02-23 [?] CRAN (R 4.0.2)
 P ellipsis        0.3.1   2020-05-15 [?] CRAN (R 4.0.2)
 P fansi           0.4.1   2020-01-08 [?] CRAN (R 4.0.2)
 P fastmap         1.1.0   2021-01-25 [?] CRAN (R 4.0.2)
 P glue            1.4.2   2020-08-27 [?] CRAN (R 4.0.2)
 P htmltools       0.5.2   2021-08-25 [?] CRAN (R 4.0.2)
 P httpuv          1.5.4   2020-06-06 [?] CRAN (R 4.0.2)
 P jquerylib       0.1.3   2020-12-17 [?] CRAN (R 4.0.2)
 P jsonlite        1.7.1   2020-09-07 [?] CRAN (R 4.0.2)
 P later           1.1.0.1 2020-06-05 [?] CRAN (R 4.0.2)
 P lifecycle       0.2.0   2020-03-06 [?] CRAN (R 4.0.2)
 P magrittr        1.5     2014-11-22 [?] CRAN (R 4.0.2)
 P mime            0.9     2020-02-04 [?] CRAN (R 4.0.2)
 P promises        1.1.1   2020-06-09 [?] CRAN (R 4.0.2)
 P R6              2.4.1   2019-11-12 [?] CRAN (R 4.0.2)
 P Rcpp            1.0.5   2020-07-06 [?] CRAN (R 4.0.2)
   renv            0.12.0  2020-08-28 [1] CRAN (R 4.0.2)
 P rlang           0.4.11  2021-04-30 [?] CRAN (R 4.0.2)
 P rsconnect       0.8.16  2019-12-13 [?] CRAN (R 4.0.2)
 P rstudioapi      0.11    2020-02-07 [?] CRAN (R 4.0.2)
 P sass            0.3.1   2021-01-24 [?] CRAN (R 4.0.2)
 P sessioninfo     1.1.1   2018-11-05 [?] CRAN (R 4.0.2)
 P shiny         * 1.6.0   2021-01-25 [?] CRAN (R 4.0.2)
 P shinyvalidate * 0.1.1   2021-06-29 [?] CRAN (R 4.0.2)
 P withr           2.2.0   2020-04-20 [?] CRAN (R 4.0.2)
 P xtable          1.8-4   2019-04-21 [?] CRAN (R 4.0.2)

rstudio / shinyvalidate

input validator does not work properly with input-group #51