bento/centos7.6 rebooting loses shared folders

I see there are some threads about shared_folders, but they aren't clear that the synced folders should still map correctly when the linux box is restarted. I have: config.vm.synced_folder "../", "/var/www/vhosts" set in my Vagrant file, but when I restart the box from the terminal, when I vagrant ssh back in to VM, the shared folder is no longer there.
I need to restart the box because I cannot seem to figure out how to turn off the blasted PHP file caching of the apache server that's installed in production, and this is a duplicate server for development locally.
At the moment the only way I can see my changes after making them are to completely 'vagrant destroy' and 'vagrant up' a new box, that's about 3 minutes.