We don't lock the arena during FSO, so you can always get back into the arena. During the first 15 minutes of the event, the fields remain open because some players tend to disco when so many planes all spawning together in the same place, and there is no need to ask permission to re-up after a disco (and I would think the reconnect feature would work - we did have it enabled for frames 1 and 2). After 15 minutes, we disable flight for all countries and if you disco you have to ask us to re-enable flight for the country you are flying for. After 30 minutes into the frame (or when people start shooting at each other), we no longer allow anyone to re-up.
The flight reconnect feature, the "temp drone while you get back into the game" apparently does not work when flight is disabled for your country, or it might not be coded to work in the special events arena. I agree that it would be nice if it worked like in the mains.