Yes. There are only 2 sections that talk about control. That is from interference (which I believe covers Eric's case 2), the other is from stuck balls when the machine is open.
"If the ball is inadvertently freed while the machine is open and drains without the player regaining complete control (stopped on a flipper), this will be treated as a major malfunction."
Interesting that there are games like doodle bug where complete control is not possible.
Andrei's situation was not either of these, but I would not have touched the machine.