emacs - How to kill shiny app in ESS without killing R process -

whenever run shiny app ess, works, can't prompt without killing whole r session (like clicking "stop" button in rstudio). normal ctrl-c cntrl-c, or cntl-g don't work. so, have resort cntrl-x k. how kill shiny process without killing r?

well, found out reason. had option

(setq comint-prompt-read-only t) 

set somewhere in init files. apparently, when option set becomes impossible (well, beyond me anyway) send kill signal r process. don't understand happening though. if run server directly httpuv can kill option set, not when running app through shiny.