The article mentioned that the aircraft become uncontrollable once it thought it was on the ground and switched control modes. And then the pilot ejected.

I assume a controlled ejection would have been during controlled flight at a time and location specifically chosen. This ejection was necessary because the plane was uncontrollable in the end.

Ah, I see, ejection in a controlled situation instead of "oh no, time to go now"

If I understood correctly, the ejection came after the second touch and go made the plane go into landed mode which made it impossible to fly anymore

I had the exact same thought.