This seems to consistently happen if the invader is piloting the Interceptor mode of the Falcon Renegade Ability. The automatic teleport to leave, after reaching 5 / 6 points, makes the invader exit the vehicle, but does not send them back to the ship. The time limit also disappears, leaving the Invader free (or stuck) to roam until they die, though any death after seems to send back, even if no revives were used previously. Might apply to other vehicle Renegade Abilities as well, but I have not tried those. This occurs in both 1v3 and 1v1 modes. In 1v1 this can be an issue if the Invader has no access to explosives or means to force their own respawn (pulling Alethonym or Fighting Lion from the vault likely make this a minor issue), while in 1v3 this means they can exploit the lack of time limit to endlessly drain the group of revive tokens, so long as they do not die themselves, though they will eventually have to die if they want to return to the ship and receive their rewards.