If i restart OMV the dockers are stopped nicelly?

As subject say, if i restart or shutdown OMV correctly using the correct options on the webui, the docker containers are stopped nicelly as if i pressed the "stop" button on the UI on each one of them?
I know that pressing the stop does a gracefull shutdown on the container but im not sure if the omv gui sends the stop command if i start a shutdown/restart of the whole system.
Im on 4.0.16-1 arrakis with docker updated if it matter in any way...