edit data gone in shiny data table after input update - r

Question

I created a data table in Shiny with the first column editable. I can enter texts but they will disappear after I switch input values and then come back. For example, I entered "testing 001" for the Category of "Male Premium BladeRazor System" and everything seemed fine (see the picture). However, after I switch my Category to another value and then come back to "Male Premium BladeRazor System", the entered text of "testing 001" would be gone. My code is pretty long, and I cut part of it for your reference. Any help will be highly appreciated. Thanks.
Example of text edits
output$tabofrandom <- DT::renderDataTable(
if (is.null(names(tab7data$dat))) {
datatable(tab7data$dat)
}
else {
datatable(isolate(tab7data$dat),
editable = list(target = 'cell', disable = list(columns = c(1,2, 3, 4,5,6,7,8,9))),
rownames = FALSE,
selection = list(mode = "single", target = "row", selected = previousSelection),
extensions = c('Buttons'),
options = list(searching=FALSE,
scrollX=T,
scrollY=277,
#processing=FALSE,
autoWidth = TRUE,
displayStart = previousPage,
dom = 'Blfrtip',
# pageLength = 5,
lengthChange = FALSE,
lengthMenu = list(c(5,10, -1), c("5","10", "All")),
buttons = list(c('pageLength','excel'),list(extend = 'colvis')),
# buttons = c('excel','colvis'),
columnDefs=list(list(targets=c(2,4,5,8),
render = JS("function(data){return data.replace(/;/g,
'<br>');}")),
...
))
) %>%
formatStyle(1:10, 'text-align' = 'left') %>%
formatStyle(1:10, 'vertical-align'='top')
} )
...
observeEvent(input[["tabofrandom_cell_edit"]], {
info <- input[["tabofrandom_cell_edit"]]
info$col=info$col+1
previousSelection <<- input$tabofrandom_rows_selected
previousPage <<- input$tabofrandom_rows_current[1] - 1
tab7data$dat<-isolate(DT::editData(tab7data$dat,info))
})
...

Answer 1

You have to set the server option of renderDataTable to FALSE or to use a proxy:
proxy <- DT::dataTableProxy("tabofrandom")
observeEvent(input[["tabofrandom_cell_edit"]], {
info <- input[["tabofrandom_cell_edit"]]
......
tab7data$dat <- DT::editData(tab7data$dat, info, proxy)
})
You don't have to do info$col + 1 for editData.