PAX stuck on tarmac when deboarding

My deboarding passengers could not leave tarmac as I had it restricted to staff only. On removing the restriction the passengers remain stuck on the tarmac. My staff leave the tarmac and find the path through the departure area (exit secure area) but the passengers remain. My boarding passengers are fine and board correctly, passengers in the terminal leave the secure area fine. I tried sending the passengers home (f10) and saving and reloading but no joy. New arriving passengers leave fine.

these ones have been hanging about for days… they are hungry… they should be dead by now!.. I’m assuming this is a bug and ill just have to start again.