you are welcome. and thanks for recognizance netCut’s value.
For your question: first we need to know how netCut works. netCut need to continue act as router inside your network. so , as soon as your shutdown laptop or leave home, since netCut no longer act as router to those controlled speed device. those device will lost access to internet until the obtain actual rotuer’s publication message. this could vary between 10 seconds to 3 minutes.
So normally , everything will back to normal speed in less than 1 minute. in worse case, ie: the device been speed/limit did not learn update from actual rotuer . that device will need to reconnect WIFI router.