routes disappearing on quick drive

so sometimes when I want to do a quick drive the route is not there but when I look under the career the routes are there same thing in standard the the routes are there too how do i prevent this from happening
https://railworksamerica.com/forum/
https://railworksamerica.com/forum/viewtopic.php?f=29&t=19569
biddydog9000 wrote:so sometimes when I want to do a quick drive the route is not there but when I look under the career the routes are there same thing in standard the the routes are there too how do i prevent this from happening