Hi,
Most failed ejectors I've seen, failed the same way. The metal just behind the ejecting triangle will become fatigued and will slowly crack, pushing the ejecting triangle slightly inwards. Which is a bit surprising, really.
The Germans must've had tons of replacement ejectors for them and I dare to say that there are very, very few lugers still have the ejector they left the factory with.
Some broken ejectors I save, along with a firing pin retainer:
