There should be a big warning in BOLD on the middle of the page that says you can not relaunch a lab and the labs are only available in one session. I tried to resume the phpMyAdmin lab and it would not restart. Ii had to go through support and trouble shoot myself to figure this out. Now I am missing a whole session. There should be something in BOLD on the page that says you can not restart and that the lab is only available in one session.